EP4334109A1 - Machine for cleaning shells by blowing - Google Patents

Machine for cleaning shells by blowing

Info

Publication number
EP4334109A1
EP4334109A1 EP22728151.6A EP22728151A EP4334109A1 EP 4334109 A1 EP4334109 A1 EP 4334109A1 EP 22728151 A EP22728151 A EP 22728151A EP 4334109 A1 EP4334109 A1 EP 4334109A1
Authority
EP
European Patent Office
Prior art keywords
cleaning machine
blowing
machine according
rotating
turntable
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.)
Pending
Application number
EP22728151.6A
Other languages
German (de)
French (fr)
Inventor
Roland CHRISTIN
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.)
Societe des Eaux Minerales dEvian SA SAEME
Original Assignee
Societe des Eaux Minerales dEvian SA SAEME
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 Societe des Eaux Minerales dEvian SA SAEME filed Critical Societe des Eaux Minerales dEvian SA SAEME
Publication of EP4334109A1 publication Critical patent/EP4334109A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B08B5/023—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
    • B08B9/0813—Cleaning containers having tubular shape, e.g. casks, barrels, drums by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
    • B08B9/28—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking
    • B08B9/283—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking by gas jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
    • B08B9/28—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking
    • B08B9/30—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking and having conveyors
    • B08B9/32—Rotating conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
    • B08B9/28—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking
    • B08B9/34—Arrangements of conduits or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0205—Bypass pressure relief valves

Definitions

  • the present invention generally relates to envelope cleaning machines forming containers or container manufacturing intermediates.
  • the casings can be plastic preforms that have to be cleaned before being transformed into containers for food liquids.
  • An object of the present invention is to respond to the drawbacks of the prior art mentioned above and in particular, first of all, to to offer a blow-off cleaning machine that saves compressed air, while remaining reliable and robust.
  • a first aspect of the invention relates to a blow-cleaning machine for envelopes forming containers or container manufacturing intermediates, comprising:
  • a turntable pivotally mounted on the frame and arranged to receive and convey a plurality of envelopes to be cleaned between an entry position and an exit position
  • - at least one blow nozzle embedded on the turntable and arranged to clean by blowing at least one envelope received and conveyed by the turntable between the entry position and the exit position
  • the cleaning machine comprises at least one rotating pneumatic distributor arranged between the fixed connector and said au at least one blowing nozzle, comprising a fixed shaft with a single distribution window arranged to supply said at least one blowing nozzle with blowing air only over a predetermined angular blowing sector between the entry position and the exit position.
  • the cleaning machine comprises a single dispensing window, which makes it possible to reduce the compressed air supply time for each blow nozzle.
  • the blow nozzles are only supplied over part of the revolution of the turntable. Provision can therefore be made to supply the blow nozzle only over a period of time necessary to guarantee sufficient cleaning. Compared to feeding over the full revolution of the turntable, a significant amount of air is saved.
  • each blowing nozzle can also be called cannula, because of its slender shape to be able to be inserted in the envelopes.
  • each blowing nozzle has a single supply circuit (going from the rotating distributor to the blowing nozzle), the blowing nozzle having a single blowing orifice forming a jet, or several blowing orifices fed simultaneously forming a plurality of jets.
  • the angular blowing sector is:
  • the rotating pneumatic distributor comprises:
  • the fixed shaft integral with the frame, and the fixed shaft comprises a fixed supply passage with a downstream outlet towards the rotating hub, the downstream outlet forming the distribution window and extending along or over the angular sector of blowing.
  • the structure is simple, and the angular blowing sector is defined by the tangential length of the distribution window.
  • the rotating hub comprises at least one rotating supply passage comprising a rotating outlet connected with said at least one blow nozzle.
  • the cleaning machine comprises a plurality of blowing nozzles, in which the rotating hub comprises a plurality of rotating supply passages each including a rotating outlet connected with one of the blow nozzles.
  • said at least one rotating supply passage has a rotating inlet arranged facing the fixed shaft, in an axial zone comprising the fixed outlet. It is the passage of the rotating inlet next to the distribution window which will allow the supply of the blowing nozzle with compressed air.
  • the rotating pneumatic distributor comprises sealing means arranged axially on either side of the downstream outlet (fixed) and/or of the rotating inlet.
  • the sealing means comprise at least one seal, such as an O-ring, and preferably a composite seal comprising an O-ring housed in a groove formed in one of the shaft fixed shaft or the rotating hub associated with a flat polymer seal housed in the groove between the O-ring and the other of the fixed shaft or the rotating hub.
  • a seal such as an O-ring
  • a composite seal comprising an O-ring housed in a groove formed in one of the shaft fixed shaft or the rotating hub associated with a flat polymer seal housed in the groove between the O-ring and the other of the fixed shaft or the rotating hub.
  • the rotating distributor comprises at least one guide bearing, and a decompression orifice formed in the rotating hub and arranged between the sealing means and the guide bearing.
  • a pressure relief port typically exhausts the internal space bounded by the fixed shaft, the rotating hub, the seal and the bearing. This avoids putting the bearing, its cage or its dust covers under pressure.
  • the cleaning machine comprises at least one flexible tube connecting, preferably directly, said at least one rotating outlet with said at least one blow nozzle.
  • a flexible tube makes it possible to directly connect the rotating hub (fixed with respect to the turntable) with the blowing nozzle or cannula (movable with respect to the turntable) without any sliding parts or pistons, which eliminates seals and complex mechanisms.
  • said at least one blowing nozzle is mounted so as to be able to engage in the casing, at least over part of the angular blowing sector.
  • the cleaning machine is provided so that the blowing nozzle(s) is(are) supplied with power once placed in the envelope.
  • the cleaning machine comprises a cam track engaged with at least one cam follower arranged to cause the relative movement of the blow nozzle with respect to the turntable.
  • said at least one blow nozzle is mounted in sliding connection with respect to the turntable.
  • the blowing sector is defined so that the blowing nozzle is supplied when the blowing nozzle is engaged in the envelope.
  • the cleaning machine comprises suction means arranged to collect residues blown by the blow nozzle.
  • the envelopes are plastic container preforms. Such preforms are intended to be transformed into final containers by a blow molding operation.
  • the rotating distributor comprises at least one spacer foot. Such a spacer foot makes it possible to position the rotating hub at the height of the connection to the blowing nozzles in order to limit the length of the flexible pipes. Friction, pinching and pressure drops are limited.
  • a union or nipple connection (with two male outlets), or a sleeve (with two female outlets), or an intermediate connection is provided between the fixed shaft and the fixed supply connection.
  • the cleaning machine comprises a force recovery and positioning device arranged between the fixed shaft and the frame.
  • a force recovery and positioning device arranged between the fixed shaft and the frame.
  • the rotary distributor comprises reversible fixing means making it possible to reversibly fix one or more keys or wedges or blocks in the distribution window, so as to adjust the extent of the angular blowing sector .
  • FIG. 1 shows a schematic side view of a cleaning machine comprising a turntable receiving envelopes to be cleaned by blowing and a rotating distributor mounted on the turntable;
  • FIG. 2 shows a cross-sectional view of the rotating distributor of the cleaning machine of FIG. 1;
  • FIG. 3 shows a top view of the rotating distributor of the cleaning machine of figure 1.
  • Figure 1 shows a blast cleaning machine for cleaning casings 100 forming containers or container manufacturing intermediates, comprising:
  • a turntable 20 pivotally mounted on the frame 10 and arranged to receive and convey a plurality of envelopes 100 to be cleaned, between an entry position and an exit position,
  • the cleaning machine is a blow-cleaning machine, which receives envelopes 100 at the input, cleans them by blowing them and puts them back in the production line at the output.
  • the envelopes 100 being conveyed by the cleaning machine during the cleaning cycle.
  • the envelopes 100 are typically containers, containers intended to contain food products, and are in this example water bottle preforms.
  • the frame 10 is shown schematically, its function being to support the constituent elements of the cleaning machine. It is possible to provide a metal frame, mechanically welded or comprising elements attached to each other, such as, for example, crosspieces or aluminum sections.
  • the turntable 20 is mounted on the frame 10 according to a pivot connection, in order to be able to pivot/rotate in rotation, under the impulse of an electric motor 21, mounted here on the frame 10 perpendicular to the axis of rotation of the turntable 20, via a reducer. It is typically possible to apply to the turntable 20 a speed of rotation of between 20 and 40 rotations per minute.
  • the turntable 20 has cavities intended to receive envelopes 100, and there may be added fittings which make it possible to receive and precisely position the envelopes 100. Means for loading and unloading the envelopes 100 on the turntable 20 can also be planned.
  • On the central part of the turntable one can provide a spacer foot 58, mounted on the turntable 20 and receiving a rotating hub 52.
  • a fixed shaft 51 is engaged in the rotating hub 52, in order to constitute a rotating distributor 50.
  • the fixed shaft 51 is fixed and held on the frame 10 via a bracket 11 which ensures a robust and precise positioning for the fixed shaft 51, as well as a recovery of efforts.
  • the blow nozzles 30 are mounted movable relative to the frame 10, in order to be able to be engaged and disengaged from the envelopes 100 during the rotation of the turntable 20.
  • a cam system can be provided, which notably comprises a cam track 32 secured to the frame 10 and which receives cam followers 33 (rollers or bearings) coupled to the blower nozzles 30.
  • the blower nozzles 30 can be mounted in sliding connection (not shown) on the frame 10, so that the rotation of the turntable 20 which embeds the blowing nozzles 30 coupled to the cam followers 33 imposes a vertical movement back and forth to the blowing nozzles 30 via the cam track 32. It may be noted that the blower nozzle 30 on the right side of FIG. left of Figure 1 is in the low position and engaged in the casing 100 located opposite.
  • the blow nozzles 30 are supplied with compressed air by a single compressed air source, from the fixed supply connection 40 and via the rotating distributor 50. Then, flexible pipes 31 directly connect the rotating hub 52 from the rotary distributor 50 to the blowing nozzles 30.
  • a suction device a hood
  • a suction device can be provided at the level of the necks or above the cleaning machine to collect these impurities and any dust thrown out of the envelopes 100.
  • the rotating hub 52 receives the fixed shaft 51, bearings 53 and seals 56, 57.
  • the bearings 53 provide an effective pivot connection and the seals (O-rings 56 mounted in a groove under flat seals 57) provide good sealing, while an elastic ring 54 locks the fixed shaft 51 on the rotating hub 52.
  • Two groups of seals 56, 57 are provided axially on either side of the radial channel shaft 512, with an O-ring 56 mounted at the bottom of the groove and a seal flat 57 in contact with the fixed shaft 51, and pushed against the latter by the O-ring 56.
  • the rotating hub 52 can be made of aluminum, and the fixed shaft 51 of stainless steel.
  • the fixed shaft 51 is axially drilled / tapped to be able to receive the fixed supply connection 40 via an axial shaft channel 511, and a radial shaft channel 511 makes it possible to distribute the air compressed radially towards the rotating hub 52 in a distribution zone surrounded by the two groups of seals 56, 57.
  • the rotating hub 52 for its part comprises a plurality of radial hub channels 521 and a plurality of axial hub channels 522, each communicating with one of the radial hub channels 521.
  • the channels hub radials 521 are through and a plug 55 is provided to plug each radial hub channel 521.
  • Figure 3 shows the rotating distributor 50 in top view.
  • the rotating hub 52 is provided with 24 axial hub channels 522, but more or less of these axial hub channels 522 can be provided. supply the blow nozzles 30 only over part of the conveying cycle, and in particular only when this compressed air can effectively clean the envelopes 100.
  • the fixed shaft 51 comprises at the downstream end of the shaft radial channel 512 a fixed outlet forming a distribution window 513 which extends over a limited angular blowing sector Saf, as shown Figure 3.
  • the distribution window 513 is not formed over the entire periphery of the fixed shaft 51 and can only supply the radial hub channels 521 which are opposite.
  • the angular blowing sector Saf extends over approximately 150°, but a different range, higher or lower, can be provided.
  • the supply of compressed air to the blowing nozzles is greatly limited compared to a known machine which supplies the blowing nozzles 30 over 360°, and a saving of compressed air can be estimated at at least 50 % compared to a conventional machine.
  • the supply pressure could be reduced from an initial value of 7 bars to a value between 1 and 2 bars.
  • Such a single distribution window 513 is easy to manufacture, and it is also possible to provide fixing means (threads in the fixed shaft for example) to attach wedges which will make it possible to adjust the value of the angular sector blowing Saf. It is also possible to exchange the fixed shaft 51 with another fixed shaft 51 machined differently to make such an adjustment. Finally, in the area of the rotary distributor 50 between the two groups of seals 56, 57, a radial clearance of between 0.025 mm and 0.1 mm, for example 0.05 mm, can be provided, which guarantees that little air escape into the other radial hub channels 521 which are not facing the distribution window 513, even if no joint is provided.
  • the bracket 11 may include means for adjusting its position (elongated holes, adjustable parts) to adjust vertically and above all angularly the position of the fixed shaft 51, in order to guarantee that the window distribution 513 is positioned so that the blowing nozzles 30 supplied are those which are engaged in the envelopes 100, such as that located on the left of FIG. 1.
  • the blowing nozzles 30 are supplied only when they are engaged in the envelopes 100, by adjusting the angular position of the fixed shaft 51, instead of for example moving the cam track 32.
  • the flexible pipes 31 directly connect the blower nozzles 30, which avoids providing sliding pistons and/or friction joints to provide a seal between the rotating hub 52 and the blower nozzles 30. It can also be noted that the flexible pipes 31 are deformed throughout the rotation cycle of the turntable 20, and the spacer foot 58 has a height calculated to guarantee a minimum length for the flexible pipes 31. The length can be provided (for example approximately 250 mm - 300 mm) of the spacer foot 58 to position the upper face of the rotating hub 52 at mid-height between the top dead center and the bottom dead center of the pneumatic connector of the flexible pipes 31 on the blowing nozzles 30. Thus, pressure losses are limited, as are friction, pinching and entanglement between the flexible pipes 31.

Abstract

The invention relates to a blowing cleaning machine for shells (100), comprising: - a frame (10), - a rotating plate (20) designed to receive and convey a plurality of shells (100) to be cleaned, - at least one blowing nozzle (30) installed on the rotating plate (20) and designed to clean at least one shell by blowing, - a fixed supply port (40) mounted fixedly on the frame (10), characterized in that the cleaning machine comprises at least one rotating distributor (50) arranged between the fixed port and the at least one blowing nozzle (30), comprising a fixed shaft (51) with a single distribution window (513) designed to supply the at least one blowing nozzle (30) with blowing air only over a predetermined angular blowing sector (Saf).

Description

DESCRIPTION DESCRIPTION
TITRE : Machine de nettoyage d’enveloppes par soufflage [0001] Domaine technique de l'invention TITLE: Machine for cleaning envelopes by blowing [0001] Technical field of the invention
[0002] La présente invention concerne de manière générale les machines de nettoyage d’enveloppes formant des récipients ou des intermédiaires de fabrication de récipients. En particulier, les enveloppes peuvent être des préformes en matière plastique devant être nettoyées avant d’être transformées en récipients pour liquides alimentaires. The present invention generally relates to envelope cleaning machines forming containers or container manufacturing intermediates. In particular, the casings can be plastic preforms that have to be cleaned before being transformed into containers for food liquids.
[0003] État de la technique [0003] State of the art
[0004] Dans l’art antérieur des machines de nettoyage d’enveloppes par soufflage, il est connu par exemple du document WO2010052416A1 de prévoir des buses de soufflage montées mobiles sur un plateau tournant et pouvant s’engager dans des enveloppes reçues par le plateau tournant pour les nettoyer. En contrepartie, ce système peut présenter plusieurs inconvénients. En particulier, la consommation d’air comprimé est importante car les impuretés éventuellement présentes dans les enveloppes sont chassées par un soufflage d’air et les buses de soufflage sont alimentées en continu. Par ailleurs, on peut aussi noter que la structure est complexe, avec des pièces sous pression qui coulissent les unes par rapport aux autres. Une telle complexité peut générer des particules en raison de l’usure par frottement des joints coulissants, et des coûts de conception, fabrication et entretien élevés. [0004] In the prior art of machines for cleaning envelopes by blowing, it is known for example from document WO2010052416A1 to provide blowing nozzles mounted movably on a turntable and able to engage in envelopes received by the plate rotating to clean them. On the other hand, this system can have several drawbacks. In particular, the consumption of compressed air is high because any impurities present in the casings are expelled by an air blow and the blowing nozzles are continuously supplied. Furthermore, it can also be noted that the structure is complex, with pressurized parts which slide relative to each other. Such complexity can generate particles due to frictional wear of sliding joints, and high design, manufacturing and maintenance costs.
[0005] Exposé de l'invention [0005] Disclosure of the invention
[0006] Un but de la présente invention est de répondre aux inconvénients de l’art antérieur mentionnés ci-dessus et en particulier, tout d'abord, de proposer une machine de nettoyage par soufflage qui permette de réaliser des économies d’air comprimé, tout en restant fiable et robuste. An object of the present invention is to respond to the drawbacks of the prior art mentioned above and in particular, first of all, to to offer a blow-off cleaning machine that saves compressed air, while remaining reliable and robust.
[0007]Pour cela un premier aspect de l'invention concerne une machine de nettoyage par soufflage pour des enveloppes formant des récipients ou des intermédiaires de fabrication de récipients, comprenant : [0007] For this, a first aspect of the invention relates to a blow-cleaning machine for envelopes forming containers or container manufacturing intermediates, comprising:
- un bâti, - a frame,
- un plateau tournant, monté pivotant sur le bâti et agencé pour recevoir et convoyer une pluralité d’enveloppes à nettoyer entre une position d’entrée et une position de sortie, - au moins une buse de soufflage, embarquée sur le plateau tournant et agencée pour nettoyer par soufflage au moins une enveloppe reçue et convoyée par le plateau tournant entre la position d’entrée et la position de sortie, - a turntable, pivotally mounted on the frame and arranged to receive and convey a plurality of envelopes to be cleaned between an entry position and an exit position, - at least one blow nozzle, embedded on the turntable and arranged to clean by blowing at least one envelope received and conveyed by the turntable between the entry position and the exit position,
- un raccord fixe d’alimentation, monté fixe sur le bâti et agencé pour être connecté à une source d’air de soufflage, caractérisée en ce que la machine de nettoyage comprend au moins un distributeur pneumatique tournant agencé entre le raccord fixe et ladite au moins une buse de soufflage, comprenant un arbre fixe avec une fenêtre de distribution unique agencée pour alimenter ladite au moins une buse de soufflage en air de soufflage uniquement sur un secteur angulaire de soufflage prédéterminé entre la position d’entrée et la position de sortie. - a fixed supply connector, fixedly mounted on the frame and arranged to be connected to a source of blowing air, characterized in that the cleaning machine comprises at least one rotating pneumatic distributor arranged between the fixed connector and said au at least one blowing nozzle, comprising a fixed shaft with a single distribution window arranged to supply said at least one blowing nozzle with blowing air only over a predetermined angular blowing sector between the entry position and the exit position.
[0008] La machine de nettoyage selon la mise en oeuvre ci-dessus comporte une unique fenêtre de distribution, qui permet de réduire le temps d’alimentation en air comprimé de chaque buse de soufflage. Autrement dit, les buses de soufflage ne sont alimentées que sur une partie de la révolution du plateau tournant. On peut donc prévoir de n’alimenter la buse de soufflage que sur une période de temps nécessaire pour garantir un nettoyage suffisant. Par rapport à une alimentation sur la révolution totale du plateau tournant, une quantité significative d’air est économisée. On peut noter que chaque buse de soufflage peut être aussi appelée canule, en raison de sa forme élancée pour pouvoir être introduite dans les enveloppes. On peut aussi noter que chaque buse de soufflage présente un unique circuit d’alimentation (allant du distributeur tournant à la buse de soufflage), la buse de soufflage ayant un seul orifice de soufflage formant un jet, ou plusieurs orifices de soufflage alimentés simultanément formant une pluralité de jets. [0008] The cleaning machine according to the above implementation comprises a single dispensing window, which makes it possible to reduce the compressed air supply time for each blow nozzle. In other words, the blow nozzles are only supplied over part of the revolution of the turntable. Provision can therefore be made to supply the blow nozzle only over a period of time necessary to guarantee sufficient cleaning. Compared to feeding over the full revolution of the turntable, a significant amount of air is saved. It can be noted that each blowing nozzle can also be called cannula, because of its slender shape to be able to be inserted in the envelopes. It can also be noted that each blowing nozzle has a single supply circuit (going from the rotating distributor to the blowing nozzle), the blowing nozzle having a single blowing orifice forming a jet, or several blowing orifices fed simultaneously forming a plurality of jets.
[0009] Selon un mode de réalisation, le secteur angulaire de soufflage est :According to one embodiment, the angular blowing sector is:
- inférieur à un secteur angulaire défini entre la position d’entrée et la position de sortie du plateau tournant, et/ou - less than an angular sector defined between the entry position and the exit position of the turntable, and/or
- compris dans une plage allant de 120° à 210° et de préférence compris dans une plage allant de 140 à 180°. On peut prévoir par exemple un secteur angulaire d’environ 150°, ce qui réduit la consommation d’air de plus de moitié, comparé à une machine de nettoyage de l’art antérieur qui alimente les buses de soufflage sur 360° (c’est-à-dire en continu). - included in a range going from 120° to 210° and preferably included in a range going from 140 to 180°. It is possible, for example, to provide an angular sector of approximately 150°, which reduces the air consumption by more than half, compared to a cleaning machine of the prior art which supplies the blowing nozzles over 360° (c' i.e. continuously).
[0010]Selon un mode de réalisation, le distributeur pneumatique tournant comprend : [0010]According to one embodiment, the rotating pneumatic distributor comprises:
- un moyeu tournant embarqué sur le plateau tournant, - a rotating hub embedded on the turntable,
- l’arbre fixe solidaire du bâti, et l’arbre fixe comprend un passage d’alimentation fixe avec une sortie aval vers le moyeu tournant, la sortie aval formant la fenêtre de distribution et s’étendant le long ou sur le secteur angulaire de soufflage. La structure est simple, et le secteur angulaire de soufflage est défini par la longueur tangentielle de la fenêtre de distribution. - the fixed shaft integral with the frame, and the fixed shaft comprises a fixed supply passage with a downstream outlet towards the rotating hub, the downstream outlet forming the distribution window and extending along or over the angular sector of blowing. The structure is simple, and the angular blowing sector is defined by the tangential length of the distribution window.
[0011]Selon un mode de réalisation, le moyeu tournant comprend au moins un passage d’alimentation tournant comprenant une sortie tournante connectée avec ladite au moins une buse de soufflage. [0011]According to one embodiment, the rotating hub comprises at least one rotating supply passage comprising a rotating outlet connected with said at least one blow nozzle.
[0012]Selon un mode de réalisation, la machine de nettoyage comprend une pluralité de buses de soufflage, dans laquelle le moyeu tournant comprend une pluralité de passages d’alimentation tournants comprenant chacun une sortie tournante connectée avec l’une des buses de soufflage. [0012]According to one embodiment, the cleaning machine comprises a plurality of blowing nozzles, in which the rotating hub comprises a plurality of rotating supply passages each including a rotating outlet connected with one of the blow nozzles.
[0013]Selon un mode de réalisation, ledit au moins un passage d’alimentation tournant présente une entrée tournante agencée en regard de l’arbre fixe, dans une zone axiale comprenant la sortie fixe. C’est le passage de l’entrée tournante en regard de la fenêtre de distribution qui va permettre l’alimentation de la buse de soufflage en air comprimé. [0013]According to one embodiment, said at least one rotating supply passage has a rotating inlet arranged facing the fixed shaft, in an axial zone comprising the fixed outlet. It is the passage of the rotating inlet next to the distribution window which will allow the supply of the blowing nozzle with compressed air.
[0014]Selon un mode de réalisation, le distributeur pneumatique tournant comprend des moyens d’étanchéité agencés axialement de part et d’autre de la sortie aval (fixe) et/ou de l’entrée tournante. [0014]According to one embodiment, the rotating pneumatic distributor comprises sealing means arranged axially on either side of the downstream outlet (fixed) and/or of the rotating inlet.
[0015]Selon un mode de réalisation, les moyens d’étanchéité comprennent au moins un joint, tel qu’un joint torique, et de préférence un joint composite comportant un joint torique logé dans une gorge ménagée dans l’un de l’arbre fixe ou du moyeu tournant associé à un joint plat polymère logé dans la gorge entre le joint torique et l’autre de l’arbre fixe ou du moyeu tournant. Un tel montage permet de prévoir un joint plat compatible par exemple aux normes alimentaires, tout en garantissant un effort élastique de contact procuré par le joint torique. [0015]According to one embodiment, the sealing means comprise at least one seal, such as an O-ring, and preferably a composite seal comprising an O-ring housed in a groove formed in one of the shaft fixed shaft or the rotating hub associated with a flat polymer seal housed in the groove between the O-ring and the other of the fixed shaft or the rotating hub. Such an assembly makes it possible to provide a flat seal compatible, for example, with food standards, while guaranteeing an elastic contact force provided by the O-ring.
[0016]Selon un mode de réalisation, le distributeur tournant comprend au moins un roulement de guidage, et un orifice de décompression ménagé dans le moyeu tournant et agencé entre les moyens d’étanchéité et le roulement de guidage. Un tel orifice de décompression met typiquement à l’échappement l’espace interne délimité par l’arbre fixe, le moyeu tournant, le joint d’étanchéité et le roulement. Cela évite de mettre le roulement, sa cage ou ses cache poussière sous pression. [0016]According to one embodiment, the rotating distributor comprises at least one guide bearing, and a decompression orifice formed in the rotating hub and arranged between the sealing means and the guide bearing. Such a pressure relief port typically exhausts the internal space bounded by the fixed shaft, the rotating hub, the seal and the bearing. This avoids putting the bearing, its cage or its dust covers under pressure.
[0017] Selon un mode de réalisation, la machine de nettoyage comprend au moins un tube flexible reliant, de préférence directement, ladite au moins une sortie tournante avec ladite au moins une buse de soufflage. Un tube flexible permet de relier directement le moyeu tournant (fixe par rapport au plateau tournant) avec la buse de soufflage ou canule (mobile par rapport au plateau tournant) sans aucune pièce coulissante ou piston, ce qui supprime des joints et des mécanismes complexes. [0018]Selon un mode de réalisation, ladite au moins une buse de soufflage est montée mobile par rapport au plateau tournant de sorte à pouvoir s’engager dans l’enveloppe, au moins sur une partie du secteur angulaire de soufflage. En d’autres termes, la machine de nettoyage est prévue pour que la ou les buse(s) de soufflage soi(en)t alimentée(s) une fois placée(s) dans l’enveloppe. According to one embodiment, the cleaning machine comprises at least one flexible tube connecting, preferably directly, said at least one rotating outlet with said at least one blow nozzle. A flexible tube makes it possible to directly connect the rotating hub (fixed with respect to the turntable) with the blowing nozzle or cannula (movable with respect to the turntable) without any sliding parts or pistons, which eliminates seals and complex mechanisms. [0018]According to one embodiment, said at least one blowing nozzle is mounted so as to be able to engage in the casing, at least over part of the angular blowing sector. In other words, the cleaning machine is provided so that the blowing nozzle(s) is(are) supplied with power once placed in the envelope.
[0019]Selon un mode de réalisation, la machine de nettoyage comprend une piste de came engagée avec au moins un suiveur de came agencé pour provoquer le mouvement relatif de la buse de soufflage par rapport au plateau tournant. [0020]Selon un mode de réalisation, ladite au moins une buse de soufflage est montée en liaison glissière par rapport au plateau tournant. [0019]According to one embodiment, the cleaning machine comprises a cam track engaged with at least one cam follower arranged to cause the relative movement of the blow nozzle with respect to the turntable. [0020]According to one embodiment, said at least one blow nozzle is mounted in sliding connection with respect to the turntable.
[0021]Selon un mode de réalisation, le secteur de soufflage est défini pour que la buse de soufflage soit alimentée lorsque la buse de soufflage est engagée dans l’enveloppe. [0022]Selon un mode de réalisation, la machine de nettoyage comprend des moyens d’aspiration agencés pour collecter des résidus soufflés par la buse de soufflage. [0021]According to one embodiment, the blowing sector is defined so that the blowing nozzle is supplied when the blowing nozzle is engaged in the envelope. [0022]According to one embodiment, the cleaning machine comprises suction means arranged to collect residues blown by the blow nozzle.
[0023] Selon un mode de réalisation, les enveloppes sont des préformes de récipients plastiques. De telles préformes sont destinées à être transformées en récipients finaux par une opération de moulage par soufflage. [0024]Selon un mode de réalisation, le distributeur tournant comprend au moins un pied entretoise. Un tel pied entretoise permet de positionner le moyeu tournant à hauteur de la connexion aux buses de soufflage pour limiter la longueur des tuyaux flexibles. Les frottements, pincements et pertes de charges sont limités. According to one embodiment, the envelopes are plastic container preforms. Such preforms are intended to be transformed into final containers by a blow molding operation. [0024]According to one embodiment, the rotating distributor comprises at least one spacer foot. Such a spacer foot makes it possible to position the rotating hub at the height of the connection to the blowing nozzles in order to limit the length of the flexible pipes. Friction, pinching and pressure drops are limited.
[0025]Selon un mode de réalisation, un raccord union ou mamelon (avec deux sorties mâles), ou un manchon (avec deux sorties femelles), ou un raccord intermédiaire est prévu entre l’arbre fixe et le raccord fixe d’alimentation. Ainsi, il est possible d’ajuster la position angulaire de l’arbre fixe et de la fenêtre de distribution par rapport au bâti de la machine de nettoyage, pour régler angulairement la position du secteur angulaire de soufflage. According to one embodiment, a union or nipple connection (with two male outlets), or a sleeve (with two female outlets), or an intermediate connection is provided between the fixed shaft and the fixed supply connection. Thus, it is possible to adjust the angular position of the fixed shaft and of the distribution window relative to the frame of the cleaning machine, to angularly adjust the position of the angular blowing sector.
[0026] Selon un mode de réalisation, la machine de nettoyage comprend un dispositif de reprise d’effort et de positionnement agencé entre l’arbre fixe et le bâti. Ainsi, il est possible de régler la position de l’arbre fixe, typiquement selon la direction axiale et/ou surtout son orientation angulaire. Les efforts de frottement internes au distributeur tournant sont également repris. [0026]According to one embodiment, the cleaning machine comprises a force recovery and positioning device arranged between the fixed shaft and the frame. Thus, it is possible to adjust the position of the fixed shaft, typically according to the axial direction and/or especially its angular orientation. The friction forces internal to the rotating distributor are also taken up.
[0027]Selon un mode de réalisation, le distributeur tournant comprend des moyens de fixation réversibles permettant de fixer de manière réversible une ou plusieurs clavettes ou cales ou blocs dans la fenêtre de distribution, de sorte à ajuster l’étendue du secteur angulaire de soufflage. [0027]According to one embodiment, the rotary distributor comprises reversible fixing means making it possible to reversibly fix one or more keys or wedges or blocks in the distribution window, so as to adjust the extent of the angular blowing sector .
[0028] Description des figures [0028] Description of the figures
[0029] D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description détaillée qui suit d'un mode de réalisation de l'invention donné à titre d'exemple nullement limitatif et illustré par les dessins annexés, dans lesquels : [0030] [fig. 1] représente une vue schématique et de côté d’une machine de nettoyage comprenant un plateau tournant recevant des enveloppes à nettoyer par soufflage et un distributeur tournant embarqué sur le plateau tournant ; [0031] [fig. 2] représente une vue en coupe du distributeur tournant de la machine de nettoyage de la figure 1 ; Other characteristics and advantages of the present invention will appear more clearly on reading the following detailed description of an embodiment of the invention given by way of non-limiting example and illustrated by the appended drawings, wherein : [0030] [fig. 1] shows a schematic side view of a cleaning machine comprising a turntable receiving envelopes to be cleaned by blowing and a rotating distributor mounted on the turntable; [0031] [fig. 2] shows a cross-sectional view of the rotating distributor of the cleaning machine of FIG. 1;
[0032] [fig. 3] représente une vue de dessus du distributeur tournant de la machine de nettoyage de la figure 1. [0032] [fig. 3] shows a top view of the rotating distributor of the cleaning machine of figure 1.
Description détaillée de mode(s) de réalisation [0033] La figure 1 représente une machine de nettoyage par soufflage pour nettoyer des enveloppes 100 formant des récipients ou des intermédiaires de fabrication de récipients, comprenant : DETAILED DESCRIPTION OF EMBODIMENT(S) [0033] Figure 1 shows a blast cleaning machine for cleaning casings 100 forming containers or container manufacturing intermediates, comprising:
- un bâti 10, - a frame 10,
- un plateau tournant 20, monté pivotant sur le bâti 10 et agencé pour recevoir et convoyer une pluralité d’enveloppes 100 à nettoyer, entre une position d’entrée et une position de sortie, - a turntable 20, pivotally mounted on the frame 10 and arranged to receive and convey a plurality of envelopes 100 to be cleaned, between an entry position and an exit position,
- une pluralité de buses de soufflage 30, embarquées sur le plateau tournant 20 et agencées pour nettoyer par soufflage les enveloppes 100 reçues et convoyées par le plateau tournant 20, - un raccord fixe d’alimentation 40, monté fixe sur le bâti 10 et agencé pour être connecté à une source d’air de soufflage (non représentée), - a plurality of blowing nozzles 30, embedded on the turntable 20 and arranged to clean by blowing the envelopes 100 received and conveyed by the turntable 20, - a fixed supply connection 40, fixedly mounted on the frame 10 and arranged to be connected to a supply air source (not shown),
- un distributeur tournant 50. - a rotating distributor 50.
[0034] D’une manière générale, la machine de nettoyage est une machine de nettoyage par soufflage, qui reçoit des enveloppes 100 en entrée, les nettoie par soufflage et les remet dans la chaîne de fabrication en sortie. Les enveloppes 100 étant convoyées par la machine de nettoyage pendant le cycle de nettoyage. [0035] Les enveloppes 100 sont typiquement des récipients, des récipients destinés à contenir des produits alimentaires, et sont dans le présent exemple des préformes de bouteilles d’eau. Cependant, on peut envisager d’autres usages ou destinations pour les enveloppes 100. [0036] Le bâti 10 est représenté de manière schématique, sa fonction étant de supporter les éléments constitutifs de la machine de nettoyage. On peut prévoir un bâti métallique, mécanosoudé ou comprenant des éléments attachés entre eux, comme par exemple des traverses ou profilés aluminium. In general, the cleaning machine is a blow-cleaning machine, which receives envelopes 100 at the input, cleans them by blowing them and puts them back in the production line at the output. The envelopes 100 being conveyed by the cleaning machine during the cleaning cycle. The envelopes 100 are typically containers, containers intended to contain food products, and are in this example water bottle preforms. However, other uses or destinations for the envelopes 100 can be envisaged. The frame 10 is shown schematically, its function being to support the constituent elements of the cleaning machine. It is possible to provide a metal frame, mechanically welded or comprising elements attached to each other, such as, for example, crosspieces or aluminum sections.
[0037] Le plateau tournant 20 est monté sur le bâti 10 selon une liaison pivot, afin de pouvoir pivoter / tourner en rotation, sous l’impulsion d’un moteur électrique 21, monté ici sur le bâti 10 à la perpendiculaire de l’axe de rotation du plateau tournant 20, via un réducteur. On peut typiquement appliquer au plateau tournant 20 une vitesse de rotation comprise entre 20 et 40 tours par minute. [0038] Le plateau tournant 20 comporte des empreintes destinées à recevoir des enveloppes 100, et on peut prévoir des posage rapportés qui permettent de recevoir et positionner précisément les enveloppes 100. Des moyens de chargement et déchargement des enveloppes 100 sur le plateau tournant 20 peuvent aussi être prévus. [0039] Sur la partie centrale du plateau tournant, on peut prévoir un pied entretoise 58, monté sur le plateau tournant 20 et recevant un moyeu tournant 52. Un arbre fixe 51 est engagé dans le moyeu tournant 52, afin de constituer un distributeur tournant 50. L’arbre fixe 51 est fixé et tenu sur le bâti 10 via une équerre 11 qui assure un positionnement robuste et précis pour l’arbre fixe 51 , ainsi qu’une reprise d’efforts. The turntable 20 is mounted on the frame 10 according to a pivot connection, in order to be able to pivot/rotate in rotation, under the impulse of an electric motor 21, mounted here on the frame 10 perpendicular to the axis of rotation of the turntable 20, via a reducer. It is typically possible to apply to the turntable 20 a speed of rotation of between 20 and 40 rotations per minute. [0038] The turntable 20 has cavities intended to receive envelopes 100, and there may be added fittings which make it possible to receive and precisely position the envelopes 100. Means for loading and unloading the envelopes 100 on the turntable 20 can also be planned. On the central part of the turntable, one can provide a spacer foot 58, mounted on the turntable 20 and receiving a rotating hub 52. A fixed shaft 51 is engaged in the rotating hub 52, in order to constitute a rotating distributor 50. The fixed shaft 51 is fixed and held on the frame 10 via a bracket 11 which ensures a robust and precise positioning for the fixed shaft 51, as well as a recovery of efforts.
[0040] Les buses de soufflage 30 (autrement appelées canules) sont montées mobiles par rapport au bâti 10, afin de pouvoir être engagées et dégagées des enveloppes 100 au cours de la rotation du plateau tournant 20. A cet effet, on peut prévoir un système à came, qui comprend notamment une piste de came 32 solidaire du bâti 10 et qui reçoit des suiveurs de came 33 (des galets ou des roulements) accouplé aux buses de soufflage 30. Les buses de soufflage 30 peuvent être montées en liaison glissière (non représentée) sur le bâti 10, si bien que la rotation du plateau tournant 20 qui embarque les buses de soufflage 30 accouplées aux suiveurs de came 33 impose un mouvement vertical de va et vient aux buses de soufflage 30 via la piste de came 32. On peut noter que la buse de soufflage 30 sur le côté droit de la figure 1 est en position haute et dégagée de l’enveloppe 100 située en regard, et que la buse de soufflage 30 sur le côté gauche de la figure 1 est en position basse et engagée dans l’enveloppe 100 située en regard. [0040] The blow nozzles 30 (otherwise called cannulas) are mounted movable relative to the frame 10, in order to be able to be engaged and disengaged from the envelopes 100 during the rotation of the turntable 20. To this end, a cam system can be provided, which notably comprises a cam track 32 secured to the frame 10 and which receives cam followers 33 (rollers or bearings) coupled to the blower nozzles 30. The blower nozzles 30 can be mounted in sliding connection (not shown) on the frame 10, so that the rotation of the turntable 20 which embeds the blowing nozzles 30 coupled to the cam followers 33 imposes a vertical movement back and forth to the blowing nozzles 30 via the cam track 32. It may be noted that the blower nozzle 30 on the right side of FIG. left of Figure 1 is in the low position and engaged in the casing 100 located opposite.
[0041] Les buses de soufflage 30 sont alimentées en air comprimé par une source d’air comprimé unique, à partir du raccord fixe d’alimentation 40 et via le distributeur tournant 50. Ensuite, des tuyaux flexibles 31 raccordent directement le moyeu tournant 52 du distributeur tournant 50 aux buses de soufflage 30. The blow nozzles 30 are supplied with compressed air by a single compressed air source, from the fixed supply connection 40 and via the rotating distributor 50. Then, flexible pipes 31 directly connect the rotating hub 52 from the rotary distributor 50 to the blowing nozzles 30.
[0042] En effet, afin de nettoyer efficacement les enveloppes 100, de l’air sous pression est injecté dans chaque enveloppe 100 pour en chasser les impuretés et éventuelles poussières. On peut prévoir au niveau des goulots ou au-dessus de la machine de nettoyage un dispositif d’aspiration (une hotte) pour collecter ces impuretés et éventuelles poussières projetées hors des enveloppes 100. Indeed, in order to effectively clean the envelopes 100, pressurized air is injected into each envelope 100 to drive out impurities and any dust. A suction device (a hood) can be provided at the level of the necks or above the cleaning machine to collect these impurities and any dust thrown out of the envelopes 100.
[0043]Comme le montre la figure 2, le moyeu tournant 52 reçoit l’arbre fixe 51 , des roulements 53 et des joints 56, 57. Les roulements 53 assurent une liaison pivot efficace et les joints (des joints toriques 56 montés dans une gorge sous des joints plats 57) assurent une bonne étanchéité, tandis qu’un jonc élastique 54 verrouille l’arbre fixe 51 sur le moyeu tournant 52. Deux groupes de joints 56, 57 sont prévus axialement de part et d’autre du canal radial d’arbre 512, avec un joint torique 56 monté en fond de gorge et un joint plat 57 en contact avec l’arbre fixe 51 , et poussé contre ce dernier par le joint torique 56. On peut donc prévoir une matière compatible avec les normes alimentaires pour le joint plat 57 (un polymère tel que du poly tétrafluorure d’éthylène par exemple) et avec une grande surface de contact et un effort de contact assuré par le joint torique 56. Le moyeu tournant 52 peut être réalisé en aluminium, et l’arbre fixe 51 en acier inoxydable. [0043] As shown in Figure 2, the rotating hub 52 receives the fixed shaft 51, bearings 53 and seals 56, 57. The bearings 53 provide an effective pivot connection and the seals (O-rings 56 mounted in a groove under flat seals 57) provide good sealing, while an elastic ring 54 locks the fixed shaft 51 on the rotating hub 52. Two groups of seals 56, 57 are provided axially on either side of the radial channel shaft 512, with an O-ring 56 mounted at the bottom of the groove and a seal flat 57 in contact with the fixed shaft 51, and pushed against the latter by the O-ring 56. It is therefore possible to provide a material compatible with food standards for the flat seal 57 (a polymer such as poly ethylene tetrafluoride by example) and with a large contact surface and a contact force provided by the O-ring 56. The rotating hub 52 can be made of aluminum, and the fixed shaft 51 of stainless steel.
[0044] Dans le détail, l’arbre fixe 51 est percé axialement / taraudé pour pouvoir recevoir le raccord fixe d’alimentation 40 via un canal axial d’arbre 511 , et un canal radial d’arbre 511 permet de distribuer l’air comprimé radialement vers le moyeu tournant 52 dans une zone de distribution entourée des deux groupes de joints 56, 57. [0044] In detail, the fixed shaft 51 is axially drilled / tapped to be able to receive the fixed supply connection 40 via an axial shaft channel 511, and a radial shaft channel 511 makes it possible to distribute the air compressed radially towards the rotating hub 52 in a distribution zone surrounded by the two groups of seals 56, 57.
[0045] Le moyeu tournant 52 comprend quant à lui une pluralité de canaux radiaux de moyeu 521 et une pluralité de canaux axiaux de moyeu 522, chacun communiquant avec l’un des canaux radiaux de moyeu 521. Pour des raisons de fabrication, les canaux radiaux de moyeu 521 sont traversants et un bouchon 55 est prévu pour boucher chaque canal radial de moyeu 521. The rotating hub 52 for its part comprises a plurality of radial hub channels 521 and a plurality of axial hub channels 522, each communicating with one of the radial hub channels 521. For manufacturing reasons, the channels hub radials 521 are through and a plug 55 is provided to plug each radial hub channel 521.
[0046] On peut noter des passage 523 ménagés radialement dans le moyeu tournant 52 pour mettre un espace interne situé entre les joints 56, 57 et les roulements 53 en communication avec l’extérieur. Cette mise en œuvre permet d’éviter de mettre les roulements 53 et leur flasques sous pression. Note passages 523 formed radially in the rotating hub 52 to put an internal space located between the seals 56, 57 and the bearings 53 in communication with the outside. This implementation makes it possible to avoid putting the bearings 53 and their shields under pressure.
[0047] La figure 3 montre le distributeur tournant 50 en vue de dessus. On peut noter que le moyeu tournant 52 est pourvu de 24 canaux axiaux de moyeu 522, mais on peut prévoir plus ou moins de ces canaux axiaux de moyeu 522. [0048] Pour économiser de l’air comprimé, il est proposé de n’alimenter les buses de soufflage 30 que sur une partie du cycle de convoyage, et en particulier uniquement lorsque cet air comprimé peut efficacement nettoyer les enveloppes 100. [0049] A cet effet, l’arbre fixe 51 comprend à l’extrémité aval du canal radial d’arbre 512 une sortie fixe formant une fenêtre de distribution 513 qui s’étend sur un secteur angulaire de soufflage Saf limité, comme le montre la figure 3. En effet, comme visible figure 2, la fenêtre de distribution 513 n’est pas formée sur toute la périphérie de l’arbre fixe 51 et ne peut alimenter que les canaux radiaux de moyeu 521 qui sont en regard. De retour figure 3, on peut noter que seuls huit canaux radiaux de moyeu 521 sont en regard de la fenêtre de distribution 513 et sont dans effectivement alimentés. La rotation dans le sens horaire du moyeu tournant 52 va provoquer successivement l’alimentation des canaux radiaux de moyeu 521 qui défilent en regard de la fenêtre de distribution 513. Figure 3 shows the rotating distributor 50 in top view. It can be noted that the rotating hub 52 is provided with 24 axial hub channels 522, but more or less of these axial hub channels 522 can be provided. supply the blow nozzles 30 only over part of the conveying cycle, and in particular only when this compressed air can effectively clean the envelopes 100. For this purpose, the fixed shaft 51 comprises at the downstream end of the shaft radial channel 512 a fixed outlet forming a distribution window 513 which extends over a limited angular blowing sector Saf, as shown Figure 3. Indeed, as shown in Figure 2, the distribution window 513 is not formed over the entire periphery of the fixed shaft 51 and can only supply the radial hub channels 521 which are opposite. Returning to Figure 3, it can be noted that only eight radial hub channels 521 are opposite the distribution window 513 and are actually supplied. The clockwise rotation of the rotating hub 52 will successively cause the supply of the radial channels of the hub 521 which pass opposite the distribution window 513.
[0050] Sur la figure 3, on peut noter que le secteur angulaire de soufflage Saf s’étend sur environ 150°, mais on peut prévoir une plage différente, supérieure ou inférieure. En tout état de cause, l’alimentation en air comprimé des buses de soufflage est fortement limitée par rapport à une machine connue qui alimente les buses de soufflage 30 sur 360°, et on peut estimer une économie d’air comprimé à au moins 50 % par rapport à une machine conventionnelle. A titre d’exemple, après avoir implanté sur une machine de nettoyage un tel distributeur tournant, définissant un secteur angulaire de soufflage Saf de 150° environ, la pression d’alimentation a pu être diminuée d’une valeur initiale de 7 bars vers une valeur comprise entre 1 et 2 bars. In Figure 3, it can be noted that the angular blowing sector Saf extends over approximately 150°, but a different range, higher or lower, can be provided. In any case, the supply of compressed air to the blowing nozzles is greatly limited compared to a known machine which supplies the blowing nozzles 30 over 360°, and a saving of compressed air can be estimated at at least 50 % compared to a conventional machine. By way of example, after installing such a rotating distributor on a cleaning machine, defining an angular blowing sector Saf of approximately 150°, the supply pressure could be reduced from an initial value of 7 bars to a value between 1 and 2 bars.
[0051] Une telle fenêtre de distribution 513 unique est aisée à fabriquer, et on peut aussi prévoir des moyens de fixation (des taraudages dans l’arbre fixe par exemple) pour attacher des cales qui vont permettre d’ajuster la valeur du secteur angulaire de soufflage Saf. On peut aussi prévoir d’échanger l’arbre fixe 51 avec un autre arbre fixe 51 usiné différemment pour effecteur un tel ajustement. Enfin, dans la zone du distributeur tournant 50 comprise entre les deux groupe de joints 56, 57, on peut prévoir un jeu radial compris entre 0.025 mm et 0.1 mm, par exemple 0.05 mm, ce qui garantit que peu d’air peu s’échapper dans les autres canaux radiaux de moyeu 521 qui ne sont pas en regard de la fenêtre de distribution 513, même si aucun joint n’est prévu. [0051] Such a single distribution window 513 is easy to manufacture, and it is also possible to provide fixing means (threads in the fixed shaft for example) to attach wedges which will make it possible to adjust the value of the angular sector blowing Saf. It is also possible to exchange the fixed shaft 51 with another fixed shaft 51 machined differently to make such an adjustment. Finally, in the area of the rotary distributor 50 between the two groups of seals 56, 57, a radial clearance of between 0.025 mm and 0.1 mm, for example 0.05 mm, can be provided, which guarantees that little air escape into the other radial hub channels 521 which are not facing the distribution window 513, even if no joint is provided.
[0052] On peut prévoir que l’équerre 11 comprennent des moyens d’ajustement de sa position (des trous oblongs, des pièces ajustables) pour régler verticalement et surtout angulairement la position de l’arbre fixe 51 , afin de garantir que la fenêtre de distribution 513 soit positionnée de telle sorte que les buses de soufflage 30 alimentées soient celles qui sont engagées dans les enveloppes 100, comme celle située à gauche de la figure 1. [0053] Ainsi, les buses de soufflage 30 ne sont alimentées que lorsqu’elles sont engagées dans les enveloppes 100, en ajustant la position angulaire de l’arbre fixe 51 , au lieu par exemple de déplacer la piste de came 32. [0052] Provision may be made for the bracket 11 to include means for adjusting its position (elongated holes, adjustable parts) to adjust vertically and above all angularly the position of the fixed shaft 51, in order to guarantee that the window distribution 513 is positioned so that the blowing nozzles 30 supplied are those which are engaged in the envelopes 100, such as that located on the left of FIG. 1. Thus, the blowing nozzles 30 are supplied only when they are engaged in the envelopes 100, by adjusting the angular position of the fixed shaft 51, instead of for example moving the cam track 32.
[0054] On peut noter que les tuyaux flexibles 31 connectent directement les buses de soufflage 30, ce qui évite de prévoir de pistons coulissants et/ou des joints de friction pour procurer une étanchéité entre le moyeu tournant 52 et les buses de soufflage 30. On peut aussi noter que les tuyaux flexibles 31 se déforment tout au long du cycle de rotation du plateau tournant 20, et le pied entretoise 58 présente une hauteur calculée pour garantir une longueur minimal aux tuyaux flexibles 31. On peut prévoir la longueur (par exemple environ 250 mm - 300 mm) du pied entretoise 58 pour positionner la face supérieure du moyeu tournant 52 à mi-hauteur entre le point mort haut et le point mort bas du connecteur pneumatique des tuyaux flexibles 31 sur les buses de soufflage 30. Ainsi, les pertes de charges sont limitées, de même que les frottements, pincements et emmêlements entre les tuyaux flexibles 31. It can be noted that the flexible pipes 31 directly connect the blower nozzles 30, which avoids providing sliding pistons and/or friction joints to provide a seal between the rotating hub 52 and the blower nozzles 30. It can also be noted that the flexible pipes 31 are deformed throughout the rotation cycle of the turntable 20, and the spacer foot 58 has a height calculated to guarantee a minimum length for the flexible pipes 31. The length can be provided (for example approximately 250 mm - 300 mm) of the spacer foot 58 to position the upper face of the rotating hub 52 at mid-height between the top dead center and the bottom dead center of the pneumatic connector of the flexible pipes 31 on the blowing nozzles 30. Thus, pressure losses are limited, as are friction, pinching and entanglement between the flexible pipes 31.
[0055] On comprendra que diverses modifications et/ou améliorations évidentes pour l'homme du métier peuvent être apportées aux différents modes de réalisation de l’invention décrits dans la présente description sans sortir du cadre de l'invention. [0055] It will be understood that various modifications and/or improvements obvious to those skilled in the art can be made to the various embodiments of the invention described in the present description without departing from the scope of the invention.

Claims

REVENDICATIONS
[Revendication 1] Machine de nettoyage par soufflage pour des enveloppes (100) formant des récipients ou des intermédiaires de fabrication de récipients, comprenant : - un bâti (10), [Claim 1] A blow-cleaning machine for casings (100) forming containers or container manufacturing intermediates, comprising: - a frame (10),
- un plateau tournant (20), monté pivotant sur le bâti (10) et agencé pour recevoir et convoyer une pluralité d’enveloppes (100) à nettoyer entre une position d’entrée et une position de sortie, - a turntable (20), pivotally mounted on the frame (10) and arranged to receive and convey a plurality of envelopes (100) to be cleaned between an entry position and an exit position,
- au moins une buse de soufflage (30), embarquée sur le plateau tournant (20) et agencée pour nettoyer par soufflage au moins une enveloppe reçue et convoyée par le plateau tournant (20) entre la position d’entrée et la position de sortie, - at least one blowing nozzle (30), embedded on the turntable (20) and arranged to clean by blowing at least one envelope received and conveyed by the turntable (20) between the entry position and the exit position ,
- un raccord fixe d’ alimentation (40), monté fixe sur le bâti (10) et agencé pour être connecté à une source d’air de soufflage, caractérisée en ce que la machine de nettoyage comprend au moins un distributeur tournant (50) agencé entre le raccord fixe et ladite au moins une buse de soufflage (30), comprenant un arbre fixe (51 ) avec une fenêtre de distribution (513) unique agencée pour alimenter ladite au moins une buse de soufflage (30) en air de soufflage uniquement sur un secteur angulaire de soufflage (Saf) prédéterminé entre la position d’entrée et la position de sortie. - a fixed supply connection (40), fixedly mounted on the frame (10) and arranged to be connected to a source of blowing air, characterized in that the cleaning machine comprises at least one rotating distributor (50) arranged between the fixed coupling and said at least one blow nozzle (30), comprising a fixed shaft (51) with a single distribution window (513) arranged to supply said at least one blow nozzle (30) with blowing air only over a predetermined angular blowing sector (Saf) between the entry position and the exit position.
[Revendication 2] Machine de nettoyage selon la revendication 1, dans laquelle le secteur angulaire de soufflage (Saf) est : [Claim 2] Cleaning machine according to claim 1, in which the angular blowing sector (Saf) is:
- inférieur à un secteur angulaire défini entre la position d’entrée et la position de sortie du plateau tournant (20), et/ou - compris dans une plage allant de 120° à 210° et de préférence compris dans une plage allant de 140 à 180°. - less than an angular sector defined between the entry position and the exit position of the turntable (20), and/or - comprised within a range extending from 120° to 210° and preferably comprised within a range extending from 140 at 180°.
[Revendication 3] Machine de nettoyage selon l’une des revendications 1 à 2, dans laquelle le distributeur pneumatique tournant comprend : [Claim 3] Cleaning machine according to one of Claims 1 to 2, in which the rotary pneumatic distributor comprises:
- un moyeu tournant (52) embarqué sur le plateau tournant (20), - l’arbre fixe (51) solidaire du bâti (10), et dans laquelle l’arbre fixe (51) comprend un passage d’alimentation fixe avec une sortie aval vers le moyeu tournant (52), la sortie aval formant la fenêtre de distribution (513) et s’étendant sur le secteur angulaire de soufflage (Saf). - a rotating hub (52) embedded on the turntable (20), - the fixed shaft (51) integral with the frame (10), and in which the fixed shaft (51) comprises a fixed supply passage with a downstream outlet towards the rotating hub (52), the downstream outlet forming the window distribution (513) and extending over the angular blowing sector (Saf).
[Revendication 4] Machine de nettoyage selon la revendication 3, dans laquelle le moyeu tournant (52) comprend au moins un passage d’alimentation tournant comprenant une sortie tournante connectée avec ladite au moins une buse de soufflage (30). [Revendication s] Machine de nettoyage selon la revendication 3 ou 4, dans laquelle le distributeur pneumatique tournant comprend des moyens d’étanchéité agencés axialement de part et d’autre de la sortie aval. [Claim 4] A cleaning machine according to claim 3, wherein the rotating hub (52) comprises at least one rotating supply passage including a rotating outlet connected with said at least one blow nozzle (30). [Claims] Cleaning machine according to claim 3 or 4, in which the rotary pneumatic distributor comprises sealing means arranged axially on either side of the downstream outlet.
[Revendication 6] Machine de nettoyage selon la revendication 5, dans laquelle les moyens d’étanchéité comprennent au moins un joint, tel qu’un joint torique (56), et de préférence un joint composite comportant un joint torique (56) logé dans une gorge ménagée dans l’un de l’arbre fixe (51) ou du moyeu tournant (52) associé à un joint plat (57) polymère logé dans la gorge entre le joint torique et l’autre de l’arbre fixe (51 ) ou du moyeu tournant (52). [Claim 6] Cleaning machine according to claim 5, in which the sealing means comprise at least one seal, such as an O-ring (56), and preferably a composite seal comprising an O-ring (56) housed in a groove formed in one of the fixed shaft (51) or of the rotating hub (52) associated with a flat seal (57) polymer housed in the groove between the O-ring and the other of the fixed shaft (51 ) or rotating hub (52).
[Revendication 7] Machine de nettoyage selon l’une des revendications 5 à 6, dans laquelle le distributeur tournant (50) comprend au moins un roulement de guidage (53), et un orifice de décompression (523) ménagé dans le moyeu tournant (52), et agencé entre les moyens d’étanchéité et le roulement de guidage (53). [Claim 7] Cleaning machine according to one of Claims 5 to 6, in which the rotating distributor (50) comprises at least one guide bearing (53), and a decompression orifice (523) provided in the rotating hub ( 52), and arranged between the sealing means and the guide bearing (53).
[Revendication 8] Machine de nettoyage selon l’une des revendications 4 à 7, comprenant au moins un tube flexible (31 ) reliant directement ladite au moins une sortie tournante avec ladite au moins une buse de soufflage (30). [Revendication 9] Machine de nettoyage selon l’une des revendications 1 à 8, dans laquelle ladite au moins une buse de soufflage (30) est montée mobile par rapport au plateau tournant (20) de sorte à pouvoir s’engager dans l’enveloppe, au moins partiellement sur le secteur angulaire de soufflage (Saf). [Claim 8] Cleaning machine according to one of claims 4 to 7, comprising at least one flexible tube (31) directly connecting said at least one rotating outlet with said at least one blow nozzle (30). [Claim 9] Cleaning machine according to one of Claims 1 to 8, in which the said at least one blowing nozzle (30) is mounted so as to be able to move with respect to the turntable (20) so as to be able to engage in the envelope, at least partially on the angular blowing sector (Saf).
[Revendication 10] Machine de nettoyage selon la revendication 10, comprenant une piste de came (32) engagée avec au moins un suiveur de came (33) agencé pour provoquer le mouvement relatif de la buse de soufflage (30) par rapport au plateau tournant (20). [Revendication 11] Machine de nettoyage selon l’une des revendications 9 à[Claim 10] A cleaning machine according to claim 10, comprising a cam track (32) engaged with at least one cam follower (33) arranged to cause the relative movement of the blower nozzle (30) with respect to the turntable (20). [Claim 11] Cleaning machine according to one of Claims 9 to
10, dans laquelle ladite au moins une buse de soufflage (30) est montée en liaison glissière par rapport au plateau tournant (20). 10, wherein said at least one blow nozzle (30) is mounted in sliding connection with respect to the turntable (20).
[Revendication 12] Machine de nettoyage selon l’une des revendications 9 à[Claim 12] Cleaning machine according to one of Claims 9 to
11 , dans laquelle le secteur angulaire de soufflage (Saf) est défini pour que la buse de soufflage (30) soit alimentée lorsque la buse de soufflage (30) est engagée dans l’enveloppe. 11, in which the angular blowing sector (Saf) is defined so that the blowing nozzle (30) is supplied when the blowing nozzle (30) is engaged in the casing.
[Revendication 13] Machine de nettoyage selon l’une des revendications 1 à[Claim 13] Cleaning machine according to one of Claims 1 to
12, comprenant des moyens d’aspiration agencés pour collecter des résidus soufflés par la buse de soufflage (30). [Revendication 14] Machine de nettoyage selon l’une des revendications 1 à12, comprising suction means arranged to collect residues blown by the blow nozzle (30). [Claim 14] Cleaning machine according to one of Claims 1 to
13, dans laquelle les enveloppes (100) sont des préformes de récipients plastiques. 13, in which the envelopes (100) are plastic container preforms.
[Revendication 15] Machine de nettoyage selon l’une des revendications 1 à[Claim 15] Cleaning machine according to one of Claims 1 to
14, dans laquelle le distributeur tournant (50) comprend au moins un pied entretoise (58). 14, wherein the rotary distributor (50) comprises at least one spacer foot (58).
EP22728151.6A 2021-05-07 2022-05-06 Machine for cleaning shells by blowing Pending EP4334109A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2104842A FR3122587A1 (en) 2021-05-07 2021-05-07 Blowing Envelope Cleaning Machine
PCT/EP2022/062314 WO2022234104A1 (en) 2021-05-07 2022-05-06 Machine for cleaning shells by blowing

Publications (1)

Publication Number Publication Date
EP4334109A1 true EP4334109A1 (en) 2024-03-13

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ID=77180112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22728151.6A Pending EP4334109A1 (en) 2021-05-07 2022-05-06 Machine for cleaning shells by blowing

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Country Link
EP (1) EP4334109A1 (en)
FR (1) FR3122587A1 (en)
WO (1) WO2022234104A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418691A (en) * 1944-03-14 1947-04-08 Owens Illinois Glass Co Machine for emptying and washing containers
FR2873310B1 (en) * 2004-07-20 2007-02-02 Sidel Sas MACHINE FOR CLEANING A CONTAINER BY INSUFFLATION BY MEANS OF A PERIPHERAL JET OF COMPRESSED GAS
FR2937889B1 (en) 2008-11-04 2012-07-27 Sidel Participations INSTALLATION FOR CLEANING CONTAINERS.
FR3109744B1 (en) * 2020-04-29 2022-05-20 Sidel Participations "Dedusting device from inside a preform"

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FR3122587A1 (en) 2022-11-11
WO2022234104A1 (en) 2022-11-10

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