EP3452264A1 - Moulding and filling station of an installation for producing filled containers from preforms by means of filling material introduced into the preform under pressure - Google Patents

Moulding and filling station of an installation for producing filled containers from preforms by means of filling material introduced into the preform under pressure

Info

Publication number
EP3452264A1
EP3452264A1 EP17739872.4A EP17739872A EP3452264A1 EP 3452264 A1 EP3452264 A1 EP 3452264A1 EP 17739872 A EP17739872 A EP 17739872A EP 3452264 A1 EP3452264 A1 EP 3452264A1
Authority
EP
European Patent Office
Prior art keywords
gas barrier
filling
forming
filling station
cross
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Withdrawn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
EP17739872.4A
Other languages
German (de)
French (fr)
Inventor
Michael Litzenberg
Michael LINKE
Gerhard KLÖPPER
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.)
KHS GmbH
Original Assignee
KHS Corpoplast GmbH
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 KHS Corpoplast GmbH filed Critical KHS Corpoplast GmbH
Publication of EP3452264A1 publication Critical patent/EP3452264A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
    • B29C2049/4602—Blowing fluids
    • B29C2049/465—Blowing fluids being incompressible
    • B29C2049/4664—Blowing fluids being incompressible staying in the final article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • B29C49/121—Stretching rod configuration, e.g. geometry; Stretching rod material
    • B29C49/1212—Stretching rod configuration, e.g. geometry; Stretching rod material the stretching rod comprising at least one opening on the surface, e.g. through which compressed air is blown into the preform to expand the same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • the present invention relates to a forming and filling station of a plant for producing filled containers from preforms by introduced under pressure into the preform liquid contents and a stretch rod for such a molding and filling station.
  • containers in particular bottles, are shaped in the blow-molding process by a molding gas flowing under pressure into a preheated preform, and in a second step are filled with a filling material, in particular a liquid filling material.
  • a filling material in particular a liquid filling material.
  • a preform can be formed into a container, it is thermally conditioned, that is, in particular heated and provided with a suitable temperature profile.
  • the body of the preform is heated to approximately 120 ° C and malleable, while the mouth area may only reach significantly lower temperatures, since the preform is held at the mouth area in the forming and filling machine and must not deform under the usual holding forces there .
  • a device for producing filled containers has a heating section, along which the preforms are guided while being provided with the desired temperature profile. The molding process must then proceed very rapidly so that the heat stored in the preform is sufficient to plastically deform the preform until completion of the molding process. Therefore, when molding with liquid product, the volume required for the molded container must be supplied to the preform under high pressure and within a short time interval.
  • the preform must also be guided during its forming in the container, so that a uniform and controlled deformation can take place. This can be done with a stretch rod, which performs a movement in the direction of the longitudinal axis of the container during the molding and filling process and thereby initiates the forming process by pressure on the bottom of the preform and then controlled by contact with the bottom region forming.
  • the stretching rod which dips into the interior of the preform through the mouth of the preform restricts the cross section available for the possible filling material supply to the stretching rod in such a way that it makes sense to feed it through the stretching rod.
  • the filling material can be fed through the stretching rod at different points of the preform or the forming container and an advantageous flow can be achieved by clever positioning of the outlet openings.
  • the filling valve with which the product flow is controlled, is normally arranged in the forming and filling head in front of the stretching rod for practical reasons, so that the volume of product downstream of it can easily run out of the stretching rod. It is already known from DE 10 2010 007 541 A1 to minimize the dripping of filling medium by mechanical means by arranging a check valve in the flow path for the filling medium. This check valve closes with spring force load as soon as the spring force exceeds the flow pressure of the filling material on the non-return element of the check valve.
  • the forming and filling station is not immediately at full pressure ready for use. After opening the filling valve, the stretching rod volume must first be supplied with filling material. The air in it must first be displaced before the full hydraulic pressure can be built up by the contents.
  • a molding and filling station of a plant for producing filled containers from preforms by under pressure into the preform introduced liquid contents comprising a stretch rod and a liquid channel which is controllable by a filling valve and at least partially passes through the stretch rod and ends in at least one outlet opening arranged in the stretch rod, which is characterized in that a gas barrier is arranged in the liquid channel between the filling valve and the outlet opening.
  • a gas barrier is an element disposed in the fluid channel that, by properly sizing or dividing the free flow area of the fluid passage, prevents air from entering the portion of the fluid passage upstream of the gas barrier.
  • a mechanical closing of the flow path is not required in contrast to the check valve of DE 10 2010 007 541 A1.
  • a gas barrier is based on the finding that a liquid which is depressurized in a line, no longer runs out of the line due to their surface tension in conjunction with the ambient pressure, if the outlet opening of the line is small enough. The surface tension then prevents dripping.
  • the barrier effect of the gas barrier is therefore based solely on the surface tension of the liquid.
  • a gas barrier may consist of a plurality of screen or flow channels which divide the overall cross section of the channel into a plurality of smaller cross sections, so that each individual cross section is small enough to achieve the desired effect.
  • the gas barrier may in particular have round or polygonal cross-sectional areas, in particular triangular or hexagonal cross-sectional areas.
  • the gas barrier may form channels with a coaxial arrangement in the stretch rod.
  • the length of a channel is greater than the diameter of its cross-sectional area.
  • the gas barrier is arranged immediately in front of the outlet opening of the flow channel. Immediately meant here mean that the remaining between the gas barrier and the outlet fluid volume is negligible. The product possibly still emerging from the stretch rod can thus be minimized.
  • the stretch rod of a forming and filling station according to the invention can also have a plurality of outlet openings.
  • the outlet openings can be arranged at the same height in the flow channel, for example a plurality of radial openings in the stretch rod, or at different heights, so that during the molding and filling process contents can be introduced into the preform at different heights.
  • a gas barrier should then preferably be arranged in front of each outlet opening. This may be a common gas barrier for a plurality of spatially close to each other outlet openings or individual, each arranged in front of the respective outlet opening gas barriers.
  • the object according to the invention is also achieved by a stretching rod for an above-described forming and filling station with a filling channel and at least one outlet opening to the outlet of filling material, which is characterized in that a gas barrier is arranged in the filling channel.
  • the gas barrier preferably divides the cross-section of the liquid channel to a plurality of cross-sectional areas. It may have round or polygonal cross-sectional areas, in particular triangular or hexagonal cross-sectional areas.
  • the gas barrier may form channels with a coaxial arrangement in the stretch rod. Preferably, the length of a channel is greater than the diameter of its cross-sectional area.
  • the gas barrier may be arranged immediately in front of the outlet opening.
  • the stretch rod may also have a plurality of outlet openings at different positions of the flow channel and a gas barrier may be arranged in front of each outlet opening.
  • Figure 1 shows schematically the elements of a forming and filling station in the context of a
  • Figure 2 shows a stretch rod according to the invention during the simultaneous forming and filling of a preform in a container in section;
  • Figure 3 shows the stretching rod of Figure 1 at the beginning of a molding and filling operation in the unpressurized state in section;
  • Figure 4 shows a perspective, partially sectioned view of a stretch rod according to the invention with a gas barrier
  • Figure 5 shows a stretch rod similar to Figure 1, wherein the stretch rod over several
  • Fig. 1 shows a longitudinal section through a preform 2, in which a stretch rod 1 is inserted.
  • the stretch rod 1 serves for the at least temporary guidance of the preform 2 during its transformation to the container. Typically, a contact takes place between the tip 18 of the stretching rod 1 and the bottom 19 of the preform 2.
  • a longitudinal stretching of the preform 2 is caused.
  • a storage device 20 is taken from introduced product 21 through the liquid channel 3 in the interior of the stretch rod 1 in the preform 2.
  • the liquid flow may be controlled by the fill valve 22.
  • Venting of the preform 2 may be accomplished using a vent valve 26.
  • the vent valve 26 is connected to an outflow opening 27, which is arranged in the region of a shaping and filling head 8 acting on the preform 2.
  • a seal 29 which may be formed, for example, as an O-ring.
  • An inner space 30 of the preform 2 can be connected to the outflow opening 27 via an annular gap 31.
  • the annular gap 31 in this case partially encloses the stretch rod 1.
  • the filling material can flow into the preform 2 through the outlet openings 4a, 4b when the filling valve is open.
  • a gas barrier 6 is arranged according to the invention.
  • Figure 2 shows a stretch rod 1 according to the invention during the simultaneous forming and filling of a preform 2 in a container in section.
  • the forming and filling head 8 of a forming and filling station of a device for simultaneously forming and filling bottles of preforms is placed at the mouth 7 of the preform.
  • the preform 2 is in a form, not shown here, which defines the shape of the bottle to be formed.
  • a liquid channel 3 can be introduced through the contents under high pressure in the preform 2.
  • the filling valve not shown in this figure, which is located above the stretch rod in the liquid flow, opened.
  • Filling material is through the outlet openings 4a, 4b and 5 in introduced the preform 2.
  • the pressure generated in the preform causes it to be transformed into a container, as indicated by the arrows.
  • FIG. 3 shows the same arrangement as in FIG. 1, but at the beginning of a molding and filling process.
  • the stretch rod 1 is already introduced into the preform 2, but is still depressurized, since the filling valve, not shown, is still closed.
  • the gas barrier 6 prevents the filling material present in the liquid channel 3 from flowing out through the outlet openings 4a, 4b, 5 in the stretching rod as long as the station is depressurized.
  • the gas barrier 6 consists of a plurality of channels 9 with a round cross section and a length L which corresponds to a multiple of the channel diameter. Which dimensions and relations between channel diameter and channel length L are suitable depends largely on the product and its surface tension. The person skilled in the art can easily determine suitable dimensions theoretically or experimentally.
  • FIG. 5 shows a stretching rod 1 similar to FIG. 1, the stretching rod having a plurality of outlet openings 4a, 4b, 5 and 4c, 4d at different height levels. Filling material can thus be introduced at different heights in the forming container.
  • a gas barrier 6a is arranged as well as in front of the upper outlet openings 4c, 4d.
  • the upper gas barrier 6b prevents contents can run from above from the liquid channel in the stretch rod when the liquid has flowed below the gas barrier 6b through the outlet openings 4c, 4d after closing the filling valve and a small unfilled area in the stretch rod in the area the upper outlet openings 4c, 4d is located.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Basic Packing Technique (AREA)

Abstract

The invention relates to a moulding and filling station of an installation for producing filled containers from preforms (2) by means of liquid filling material introduced into the preform (2) under pressure, said moulding and filling station comprising a stretch rod (1) and a liquid duct (3), which can be controlled by means of a filling valve (22), passes through at least part of the stretch rod (1) and ends in at least one outlet opening (4a, 4b, 4c, 4d, 5) in the stretch rod (1), and being characterised in that a gas barrier (6, 6a, 6b) is provided in the liquid duct (3) between the filling valve (22) and the outlet opening (4a, 4b, 4c, 4d, 5). The invention also relates to a stretch rod (1) for a moulding and filling station, having a filling material duct (3) and at least one outlet opening (4a, 4b, 4c, 4d, 5) for discharging filling material, a gas barrier (6, 6a, 6b) being provided in the filling material duct (3).

Description

Beschreibung  description
Form- und Füllstation einer Anlage zum Herstellen von gefüllten Behältern aus Vorformlingen durch unter Druck in den Vorformling eingeleitetes Füllgut Forming and filling station of a plant for producing filled containers from preforms by introduced under pressure into the preform contents
Die vorliegende Erfindung betrifft eine Form- und Füllstation einer Anlage zum Herstellen von gefüllten Behältern aus Vorformlingen durch unter Druck in den Vorformling eingeleitetes flüssiges Füllgut sowie eine Reckstange für eine solche Form- und Füllstation. The present invention relates to a forming and filling station of a plant for producing filled containers from preforms by introduced under pressure into the preform liquid contents and a stretch rod for such a molding and filling station.
Herkömmlich werden Behälter, insbesondere Flaschen, im Blasformverfahren durch ein unter Druck in einen vorgeheizten Vorformling einströmendes Formgas geformt und in einem zweiten Schritt mit einem Füllgut, insbesondere einem flüssigen Füllgut, befüllt. Zur rationelleren Herstellung sind in letzter Zeit Verfahren entwickelt worden, bei denen der vorgeheizte Vorformling nicht durch ein Druckgas, sondern durch das unter Druck zugeführte flüssige Füllgut in einem Schritt geformt und gefüllt werden kann. Ein solches Verfahren ist z.B. aus der DE 10 2010 007 541 A1 bekannt. Traditionally, containers, in particular bottles, are shaped in the blow-molding process by a molding gas flowing under pressure into a preheated preform, and in a second step are filled with a filling material, in particular a liquid filling material. For more rational production processes have recently been developed in which the preheated preform can not be shaped and filled by a pressurized gas, but by the supplied under pressure liquid product in one step. Such a method is e.g. known from DE 10 2010 007 541 A1.
Damit ein Vorformling in einen Behälter umgeformt werden kann, wird er thermisch konditioniert, also insbesondere erwärmt und mit einem geeigneten Temperaturprofil versehen. Dabei wird der Körper des Vorformlings z.B. auf ca. 120 °C erwärmt und formbar, während der Mündungsbereich nur deutlich niedrigere Temperaturen erreichen darf, da der Vorformling am Mündungsbereich in der Form- und Füllmaschine gehalten wird und sich unter den dort üblichen Haltekräften nicht verformen darf. Für die thermische Konditionierung verfügt eine Vorrichtung zur Herstellung von gefüllten Behältern über eine Heizstrecke, entlang der die Vorformlinge geführt und dabei mit dem gewünschten Termperaturprofil versehen werden. Der Formvorgang muss dann sehr schnell vonstatten gehen, damit die im Vorformling gespeicherte Wärme ausreicht, um den Vorformling bis zum Abschluss des Formvorgangs plastisch verformbar zu erhalten. Bei der Formung mit flüssigem Füllgut muss dem Vorformling das für den ausgeformten Behälter erforderliche Volumen deshalb unter hohem Druck und innerhalb eines kurzen Zeitintervalls zugeführt werden. So that a preform can be formed into a container, it is thermally conditioned, that is, in particular heated and provided with a suitable temperature profile. In this case, the body of the preform is heated to approximately 120 ° C and malleable, while the mouth area may only reach significantly lower temperatures, since the preform is held at the mouth area in the forming and filling machine and must not deform under the usual holding forces there , For thermal conditioning, a device for producing filled containers has a heating section, along which the preforms are guided while being provided with the desired temperature profile. The molding process must then proceed very rapidly so that the heat stored in the preform is sufficient to plastically deform the preform until completion of the molding process. Therefore, when molding with liquid product, the volume required for the molded container must be supplied to the preform under high pressure and within a short time interval.
Der Vorformling muss während seiner Umformung in den Behälter außerdem geführt werden, damit eine gleichmäßige und kontrollierte Umformung stattfinden kann. Dies kann mit einer Reckstange geschehen, die während des Form- und Füllvorgangs eine Bewegung in Richtung der Längsachse des Behälters vollführt und dabei den Umformvorgang durch Druck auf den Boden des Vorformlings auslöst und anschließend durch Kontakt mit dem Bodenbereich die Umformung kontrolliert. The preform must also be guided during its forming in the container, so that a uniform and controlled deformation can take place. This can be done with a stretch rod, which performs a movement in the direction of the longitudinal axis of the container during the molding and filling process and thereby initiates the forming process by pressure on the bottom of the preform and then controlled by contact with the bottom region forming.
Es bietet sich dabei an, das Füllgut durch die Reckstange zuzuführen. Die durch die Mündung des Vorformlings in das Innere des Vorformlings eintauchende Reckstange schränkt den für die etwaige Füllgutzufuhr verfügbaren Querschnitt an der Reckstange vorbei ohnehin so stark ein, dass eine Zuführung durch die Reckstange sinnvoll erscheint. Andererseits kann das Füllgut durch die Reckstange hindurch an unterschiedlichen Stellen des Vorformlings bzw. des sich formenden Behälters zugeführt und durch geschickte Positionierung der Auslassöffnungen eine vorteilhafte Strömung erreicht werden. It is advisable to feed the product through the stretching rod. The stretching rod which dips into the interior of the preform through the mouth of the preform restricts the cross section available for the possible filling material supply to the stretching rod in such a way that it makes sense to feed it through the stretching rod. On the other hand, the filling material can be fed through the stretching rod at different points of the preform or the forming container and an advantageous flow can be achieved by clever positioning of the outlet openings.
Allerdings kommt es bei der Verwendung einer Reckstange nach Beendigung des Formund Füllvorgangs leicht zu einem Nachtropfen von Füllgut aus der Reckstange. Das Füllventil, mit dem der Füllgutstrom gesteuert wird, ist aus praktischen Gründen normalerweise im Form- und Füllkopf vor der Reckstange angeordnet, so dass das stromabwärts davon befindliche Füllgutvolumen leicht aus der Reckstange herauslaufen kann. Aus der DE 10 2010 007 541 A1 ist bereits bekannt, das Nachtropfen von Füllmedium auf mechanischem Wege dadurch zu minimieren, dass im Strömungsweg für das Füllmedium ein Rückschlagventil angeordnet wird. Dieses Rückschlagventil schließt federkraftbelastet, sobald die Federkraft den Strömungsdruck des Füllgutes auf das Rückschlagelement des Rückschlagventils übersteigt. However, it comes with the use of a stretch rod after completion of the molding and filling easily dripping of contents from the stretch rod. The filling valve, with which the product flow is controlled, is normally arranged in the forming and filling head in front of the stretching rod for practical reasons, so that the volume of product downstream of it can easily run out of the stretching rod. It is already known from DE 10 2010 007 541 A1 to minimize the dripping of filling medium by mechanical means by arranging a check valve in the flow path for the filling medium. This check valve closes with spring force load as soon as the spring force exceeds the flow pressure of the filling material on the non-return element of the check valve.
Das Nachtropfen von Füllgut führt zu einer Verunreinigung der Form- und Füllstation und zu Füllgutverlusten. Außerdem ist die Form- und Füllstation nicht sofort mit vollem Druck einsatzbereit. Nach dem Öffnen des Füllventils muss erst das Reckstangenvolumen mit Füllgut versorgt werden. Die darin befindliche Luft muss zunächst verdrängt werden, bevor der volle hydraulische Druck durch das Füllgut aufgebaut werden kann. The dripping of filling material leads to contamination of the forming and filling station and to Füllgutverlusten. In addition, the forming and filling station is not immediately at full pressure ready for use. After opening the filling valve, the stretching rod volume must first be supplied with filling material. The air in it must first be displaced before the full hydraulic pressure can be built up by the contents.
Es ist Aufgabe der vorliegenden Erfindung, eine Form- und Füllstation einer Anlage zum Herstellen von gefüllten Behältern aus Vorformlingen durch unter Druck in den Vorformling eingeleitetes flüssiges Füllgut, die eine Reckstange umfasst, derart fortzubilden, dass es nicht zu Füllgutverlusten durch aus der Reckstange nachtropfendes Füllgut kommt. It is an object of the present invention, a form and filling station of a plant for producing filled containers from preforms by under pressure into the preform introduced liquid contents, which includes a stretch rod, train such that it does not cause Füllgutverlusten by the stretching rod nachropfendes product comes.
Die Aufgabe wird erfindungsgemäß gelöst durch eine Form- und Füllstation einer Anlage zum Herstellen von gefüllten Behältern aus Vorformlingen durch unter Druck in den Vorformling eingeleitetes flüssiges Füllgut, umfassend eine Reckstange und einen Flüssigkeitskanal, der durch ein Füllventil steuerbar ist und der die Reckstange zumindest teilweise durchläuft und in mindestens einer in der Reckstange angeordneten Auslassöffnung endet, die dadurch gekennzeichnet ist, dass im Flüssigkeitskanal zwischen Füllventil und Auslassöffnung eine Gassperre angeordnet ist. The object is achieved by a molding and filling station of a plant for producing filled containers from preforms by under pressure into the preform introduced liquid contents, comprising a stretch rod and a liquid channel which is controllable by a filling valve and at least partially passes through the stretch rod and ends in at least one outlet opening arranged in the stretch rod, which is characterized in that a gas barrier is arranged in the liquid channel between the filling valve and the outlet opening.
Eine Gassperre ist ein im Flüssigkeitskanal angeordnetes Element, das durch geeignete Dimensionierung oder Aufteilung des freien Strömungsquerschnitts des Flüssigkeitskanals verhindert, dass Luft in den Abschnitt des Flüssigkeitskanal stromaufwärts der Gassperre eindringen kann. Ein mechanisches Verschließen des Strömungsweges ist dazu im Gegensatz zum Rückschlagventil der DE 10 2010 007 541 A1 nicht erforderlich. Einer Gassperre liegt nämlich die Erkenntnis zugrunde, dass eine Flüssigkeit, die sich drucklos in einer Leitung befindet, aufgrund ihrer Oberflächenspannung im Zusammenwirken mit dem Umgebungsdruck nicht mehr aus der Leitung herausläuft, sofern die Auslassöffnung der Leitung nur klein genug ist. Die Oberflächenspannung verhindert dann die Tropfenbildung. Die Sperrwirkung der Gassperre beruht also einzig auf der Oberflächenspannung der Flüssigkeit. A gas barrier is an element disposed in the fluid channel that, by properly sizing or dividing the free flow area of the fluid passage, prevents air from entering the portion of the fluid passage upstream of the gas barrier. A mechanical closing of the flow path is not required in contrast to the check valve of DE 10 2010 007 541 A1. A gas barrier is based on the finding that a liquid which is depressurized in a line, no longer runs out of the line due to their surface tension in conjunction with the ambient pressure, if the outlet opening of the line is small enough. The surface tension then prevents dripping. The barrier effect of the gas barrier is therefore based solely on the surface tension of the liquid.
Eine Gassperre kann deshalb beispielsweise aus einer Mehrzahl von Sieb- oder Strömungskanälen bestehen, die den Gesamtquerschnitt des Kanals auf mehrere kleinere Querschnitte aufteilen, so dass jeder einzelne Querschnitt klein genug ist, um die gewünschte Wirkung zu erzielen. Die Gassperre kann insbesondere runde oder mehreckige Querschnittsflächen aufweisen, insbesondere dreieckige oder sechseckige Querschnittsflächen. Therefore, for example, a gas barrier may consist of a plurality of screen or flow channels which divide the overall cross section of the channel into a plurality of smaller cross sections, so that each individual cross section is small enough to achieve the desired effect. The gas barrier may in particular have round or polygonal cross-sectional areas, in particular triangular or hexagonal cross-sectional areas.
Die Gassperre kann Kanäle mit einer koaxialen Anordnung in der Reckstange bilden. Vorzugsweise ist dabei die Länge eines Kanals größer als der Durchmesser seiner Querschnittsfläche. The gas barrier may form channels with a coaxial arrangement in the stretch rod. Preferably, the length of a channel is greater than the diameter of its cross-sectional area.
Welche Dimensionen und Relationen zwischen Kanaldurchmesser und Kanallänge geeignet sind, hängt maßgeblich vom Füllgut und dessen Oberflächenspannung ab. Der Fachmann kann geeignete Abmessungen leicht theoretisch oder experimentell ermitteln. Which dimensions and relations between the channel diameter and the channel length are suitable depends largely on the contents and their surface tension. The person skilled in the art can easily determine suitable dimensions theoretically or experimentally.
Vorteilhaft ist die Gassperre unmittelbar vor der Auslassöffnung des Strömungskanals angeordnet. Unmittelbar soll hier bedeuten, dass das zwischen der Gassperre und der Auslassöffnung verbleibende Flüssigkeitsvolumen vernachlässigbar gering ist. Das aus der Reckstange möglicherweise noch austretende Füllgut kann so minimiert werden. Advantageously, the gas barrier is arranged immediately in front of the outlet opening of the flow channel. Immediately meant here mean that the remaining between the gas barrier and the outlet fluid volume is negligible. The product possibly still emerging from the stretch rod can thus be minimized.
Die Reckstange einer erfindungsgemäßen Form- und Füllstation kann auch über mehrere Auslassöffnungen verfügen. Die Auslassöffnungen können auf gleicher Höhe im Strömungskanal angeordnet sein, beispielsweise mehrere radiale Öffnungen in der Reckstange, oder auf verschiedenen Höhen, so dass während des Form- und Füllvorgangs Füllgut in den Vorformling in unterschiedlichen Höhen eingebracht werden kann. Eine Gassperre sollte dann vorzugsweise vor jeder Auslassöffnung angeordnet sein. Dabei kann es sich um eine gemeinsame Gassperre für mehrere räumlich enger beieinander liegende Auslassöffnungen handeln oder um einzelne, jeweils vor der betreffenden Auslassöffnung angeordnete Gassperren. The stretch rod of a forming and filling station according to the invention can also have a plurality of outlet openings. The outlet openings can be arranged at the same height in the flow channel, for example a plurality of radial openings in the stretch rod, or at different heights, so that during the molding and filling process contents can be introduced into the preform at different heights. A gas barrier should then preferably be arranged in front of each outlet opening. This may be a common gas barrier for a plurality of spatially close to each other outlet openings or individual, each arranged in front of the respective outlet opening gas barriers.
Die erfindungsgemäße Aufgabe wird auch gelöst durch eine Reckstange für eine vorstehend beschriebene Form- und Füllstation mit einem Füllgutkanal und mindestens einer Auslassöffnung zum Auslass von Füllgut, die dadurch gekennzeichnet ist, dass im Füllgutkanal eine Gassperre angeordnet ist. The object according to the invention is also achieved by a stretching rod for an above-described forming and filling station with a filling channel and at least one outlet opening to the outlet of filling material, which is characterized in that a gas barrier is arranged in the filling channel.
Die Gassperre teilt den Querschnitt des Flüssigkeitskanals vorzugsweise auf eine Mehrzahl von Querschnittsflächen auf. Sie kann runde oder mehreckige Querschnittsflächen aufweisen, insbesondere dreieckige oder sechseckige Querschnittsflächen. Die Gassperre kann Kanäle mit einer koaxialen Anordnung in der Reckstange bilden. Vorzugsweise ist dabei die Länge eines Kanals größer als der Durchmesser seiner Querschnittsfläche. The gas barrier preferably divides the cross-section of the liquid channel to a plurality of cross-sectional areas. It may have round or polygonal cross-sectional areas, in particular triangular or hexagonal cross-sectional areas. The gas barrier may form channels with a coaxial arrangement in the stretch rod. Preferably, the length of a channel is greater than the diameter of its cross-sectional area.
Vorzugsweise kann die Gassperre unmittelbar vor der Auslassöffnung angeordnet sein. Die Reckstange kann auch über mehrere Auslassöffnungen an unterschiedlichen Positionen des Strömungskanals verfügen und vor jeder Auslassöffnung eine Gassperre angeordnet sein. Preferably, the gas barrier may be arranged immediately in front of the outlet opening. The stretch rod may also have a plurality of outlet openings at different positions of the flow channel and a gas barrier may be arranged in front of each outlet opening.
Verschiedene Ausführungsbeispiele erfindungsgemäßer Reckstangen werden nachfolgend anhand der beigefügten Abbildungen näher erläutert, die Folgendes darstellen: Various embodiments of stretch rods according to the invention are explained in more detail below with reference to the accompanying drawings, which show the following:
Figur 1 zeigt schematisch die Elemente einer Form- und Füllstation im Kontext einer Figure 1 shows schematically the elements of a forming and filling station in the context of a
Maschine zum simultanen Formen und Füllen von Behältern;  Machine for simultaneously forming and filling containers;
Figur 2 zeigt eine erfindungsgemäße Reckstange während der simultanen Umformung und Füllung eines Vorformlings in einen Behälter im Schnitt; Figure 2 shows a stretch rod according to the invention during the simultaneous forming and filling of a preform in a container in section;
Figur 3 zeigt die Reckstange aus Figur 1 zu Beginn eines Form- und Füllvorgangs im drucklosen Zustand im Schnitt; Figure 3 shows the stretching rod of Figure 1 at the beginning of a molding and filling operation in the unpressurized state in section;
Figur 4 zeigt eine perspektivische, teilweise geschnittene Darstellung einer erfindungsgemäßen Reckstange mit einer Gassperre; Figure 4 shows a perspective, partially sectioned view of a stretch rod according to the invention with a gas barrier;
Figur 5 zeigt eine Reckstange ähnlich der Figur 1 , wobei die Reckstange über mehrere Figure 5 shows a stretch rod similar to Figure 1, wherein the stretch rod over several
Auslassöffnungen auf unterschiedlichen Höhen verfügt.  Outlet openings at different heights.
Alle Darstellungen verstehen sich als Veranschaulichung des Prinzips der Erfindung. Sie sind teilweise vereinfacht dargestellt und umfassen nur die zur Veranschaulichung der Erfindung erforderlichen Bauteile. Die Größenrelationen der einzelnen Bauteile zueinander kann ein Fachmann mit seinem Fachwissen ohne Weiteres verändern oder den konkreten Bedürfnissen anpassen. Fig. 1 zeigt einen Längsschnitt durch einen Vorformling 2, in den eine Reckstange 1 eingeführt ist. Die Reckstange 1 dient der mindestens zeitweisen Führung des Vorformlings 2 während seiner Umformung zum Behälter. Typischerweise erfolgt ein Kontakt zwischen der Kuppe 18 der Reckstange 1 und dem Boden 19 des Vorformlings 2. Bei einem weiteren Einfahren der Reckstange 1 in den Vorformling 2 hinein wird eine Längsreckung des Vorformlings 2 verursacht. Nach einem Abschluss des Reckvorganges oder auch bereits während der Durchführung des Reckvorganges wird einer Vorratseinrichtung 20 entnommenes Füllgut 21 durch den Flüssigkeitskanal 3 im Inneren der Reckstange 1 in den Vorformling 2 eingeleitet. Der Flüssigkeitsstrom kann durch das Füllventil 22 gesteuert werden. All illustrations are illustrative of the principle of the invention. They are shown partially simplified and include only the components required to illustrate the invention. The size relations of the individual components to one another can readily be changed by a person skilled in the art with his specialist knowledge or be adapted to the concrete requirements. Fig. 1 shows a longitudinal section through a preform 2, in which a stretch rod 1 is inserted. The stretch rod 1 serves for the at least temporary guidance of the preform 2 during its transformation to the container. Typically, a contact takes place between the tip 18 of the stretching rod 1 and the bottom 19 of the preform 2. Upon further retraction of the stretching rod 1 into the preform 2, a longitudinal stretching of the preform 2 is caused. After completion of the stretching process or even during the execution of the stretching process, a storage device 20 is taken from introduced product 21 through the liquid channel 3 in the interior of the stretch rod 1 in the preform 2. The liquid flow may be controlled by the fill valve 22.
Eine Entlüftung des Vorformlings 2 kann unter Verwendung eines Entlüftungsventils 26 erfolgen. Das Entlüftungsventil 26 ist mit einer Ausströmöffnung 27 verbunden, die im Bereich eines den Vorformling 2 beaufschlagenden Form- und Füllkopfes 8 angeordnet ist. Durch den Form- und Füllkopf 8 hindurch ist die Reckstange 1 positionierbar. Der Vorformling 2 wird gegenüber dem Form- und Füllkopf 28 von einer Dichtung 29 abgedichtet, die beispielsweise als ein O-Ring ausgebildet sein kann. Ein Innenraum 30 des Vorformlings 2 kann über einen Ringspalt 31 mit der Ausströmöffnung 27 verbunden sein Der Ringspalt 31 umschließt hierbei bereichsweise die Reckstange 1. Venting of the preform 2 may be accomplished using a vent valve 26. The vent valve 26 is connected to an outflow opening 27, which is arranged in the region of a shaping and filling head 8 acting on the preform 2. Through the forming and filling head 8 through the stretch rod 1 is positioned. The preform 2 is sealed relative to the forming and filling head 28 by a seal 29, which may be formed, for example, as an O-ring. An inner space 30 of the preform 2 can be connected to the outflow opening 27 via an annular gap 31. The annular gap 31 in this case partially encloses the stretch rod 1.
Das Füllgut kann bei geöffnetem Füllventil durch die Auslassöffnungen 4a, 4b in den Vorformling 2 einströmen. Vor den Auslassöffnungen ist erfindungsgemäß eine Gassperre 6 angeordnet. The filling material can flow into the preform 2 through the outlet openings 4a, 4b when the filling valve is open. In front of the outlet openings, a gas barrier 6 is arranged according to the invention.
Figur 2 zeigt eine erfindungsgemäße Reckstange 1 während der simultanen Umformung und Füllung eines Vorformlings 2 in einen Behälter im Schnitt. Auf die Mündung 7 des Vorformlings ist der Form- und Füllkopf 8 einer Form- und Füllstation einer Vorrichtung zum gleichzeitigen Formen und Füllen von Flaschen aus Vorformlingen aufgesetzt. Der Vorformling 2 befindet sich in einer hier nicht dargestellten Form, die die Form der zu formenden Flasche definiert. Figure 2 shows a stretch rod 1 according to the invention during the simultaneous forming and filling of a preform 2 in a container in section. At the mouth 7 of the preform, the forming and filling head 8 of a forming and filling station of a device for simultaneously forming and filling bottles of preforms is placed. The preform 2 is in a form, not shown here, which defines the shape of the bottle to be formed.
Im Inneren der Reckstange 1 befindet sich ein Flüssigkeitskanal 3, durch den Füllgut unter hohem Druck in den Vorformling 2 eingeleitet werden kann. Hierfür wird das in dieser Abbildung nicht dargestellte Füllventil, das oberhalb der Reckstange im Flüssigkeitsstrom liegt, geöffnet. Füllgut wird durch die Auslassöffnungen 4a, 4b und 5 in den Vorformling 2 eingeleitet. Der im Vorformling entstehende Druck sorgt für die Umformung in einen Behälter, wie die Pfeile andeuten. Inside the stretch rod 1 is a liquid channel 3, can be introduced through the contents under high pressure in the preform 2. For this purpose, the filling valve, not shown in this figure, which is located above the stretch rod in the liquid flow, opened. Filling material is through the outlet openings 4a, 4b and 5 in introduced the preform 2. The pressure generated in the preform causes it to be transformed into a container, as indicated by the arrows.
Unmittelbar vor den Auslassöffnungen 4a, 4b und 5 befindet sich eine Gassperre 6. Immediately before the outlet openings 4a, 4b and 5 is a gas barrier. 6
In Figur 3 ist dieselbe Anordnung wie in Figur 1 dargestellt, jedoch zu Beginn eines Formund Füllvorgangs. Die Reckstange 1 ist bereits in den Vorformling 2 eingeführt, ist jedoch noch drucklos, da das nicht dargestellte Füllventil noch geschlossen ist. Die Gassperre 6 verhindert, dass das im Flüssigkeitskanal 3 vorhandene Füllgut durch die Auslassöffnungen 4a, 4b, 5 in der Reckstange herausfließen kann, solange die Station drucklos ist. FIG. 3 shows the same arrangement as in FIG. 1, but at the beginning of a molding and filling process. The stretch rod 1 is already introduced into the preform 2, but is still depressurized, since the filling valve, not shown, is still closed. The gas barrier 6 prevents the filling material present in the liquid channel 3 from flowing out through the outlet openings 4a, 4b, 5 in the stretching rod as long as the station is depressurized.
Hierfür ist, wie in Figur 4 dargestellt, eine Gassperre 6 in der hier teilweise geschnitten dargestellten Reckstange 1 angeordnet. Die Gassperre 6 besteht aus einer Vielzahl von Kanälen 9 mit rundem Querschnitt und einer Länge L, die einem Mehrfachen des Kanaldurchmessers entspricht. Welche Dimensionen und Relationen zwischen Kanaldurchmesser und Kanallänge L geeignet sind, hängt maßgeblich vom Füllgut und dessen Oberflächenspannung ab. Der Fachmann kann geeignete Abmessungen leicht theoretisch oder experimentell ermitteln. For this purpose, as shown in Figure 4, a gas barrier 6 in the stretch rod 1 shown here partially cut arranged. The gas barrier 6 consists of a plurality of channels 9 with a round cross section and a length L which corresponds to a multiple of the channel diameter. Which dimensions and relations between channel diameter and channel length L are suitable depends largely on the product and its surface tension. The person skilled in the art can easily determine suitable dimensions theoretically or experimentally.
Figur 5 zeigt eine Reckstange 1 ähnlich der Figur 1 , wobei die Reckstange über mehrere Auslassöffnungen 4a, 4b, 5 und 4c, 4d auf unterschiedlichen Höhenniveaus verfügt. Füllgut kann so auf unterschiedlichen Höhen in den sich formenden Behälter eingebracht werden. Sowohl unmittelbar vor den unteren Auslassöffnungen 4a, 4b, 5 ist eine Gassperre 6a angeordnet als auch vor den oberen Auslassöffnungen 4c, 4d. Die obere Gassperre 6b verhindert, dass Füllgut von oberhalb aus dem Flüssigkeitskanal in der Reckstange nachlaufen kann, wenn die Flüssigkeit unterhalb der Gassperre 6b durch die Auslassöffnungen 4c, 4d nach dem Schließen des Füllventils abgeflossen ist und sich ein kleiner ungefüllter Bereich in der Reckstange im Bereich der oberen Auslassöffnungen 4c, 4d befindet. FIG. 5 shows a stretching rod 1 similar to FIG. 1, the stretching rod having a plurality of outlet openings 4a, 4b, 5 and 4c, 4d at different height levels. Filling material can thus be introduced at different heights in the forming container. Both directly in front of the lower outlet openings 4a, 4b, 5, a gas barrier 6a is arranged as well as in front of the upper outlet openings 4c, 4d. The upper gas barrier 6b prevents contents can run from above from the liquid channel in the stretch rod when the liquid has flowed below the gas barrier 6b through the outlet openings 4c, 4d after closing the filling valve and a small unfilled area in the stretch rod in the area the upper outlet openings 4c, 4d is located.

Claims

Patentansprüche claims
1. Form- und Füllstation einer Anlage zum Herstellen von gefüllten Behältern aus Vorformlingen (2) durch unter Druck in den Vorformling (2) eingeleitetes flüssiges Füllgut, umfassend eine Reckstange (1) und einen Flüssigkeitskanal (3), der durch ein Füllventil (22) steuerbar ist und der die Reckstange (1 ) zumindest teilweise durchläuft und in mindestens einer in der Reckstange (1) angeordneten Auslassöffnung (4a, 4b, 4c, 4d, 5) endet, dadurch gekennzeichnet, dass im Flüssigkeitskanal (3) zwischen Füllventil (22) und Auslassöffnung (4a, 4b, 4c, 4d, 5) eine Gassperre (6, 6a, 6b) angeordnet ist. 1. Forming and filling station of a plant for producing filled containers of preforms (2) by under pressure in the preform (2) introduced liquid product, comprising a stretching rod (1) and a liquid channel (3) by a filling valve (22 ) is controllable and at least partially passes through the stretching rod (1) and ends in at least one outlet opening (4a, 4b, 4c, 4d, 5) arranged in the stretching rod (1), characterized in that in the liquid channel (3) between the filling valve (3) 22) and outlet opening (4a, 4b, 4c, 4d, 5) a gas barrier (6, 6a, 6b) is arranged.
2. Form- und Füllstation nach Anspruch 1 , dadurch gekennzeichnet, dass die Gassperre (6, 6a, 6b) den Querschnitt des Flüssigkeitskanals (3) auf eine Mehrzahl von Querschnittsflächen (9) aufteilt. 2. Forming and filling station according to claim 1, characterized in that the gas barrier (6, 6 a, 6 b) divides the cross section of the liquid channel (3) onto a plurality of cross-sectional areas (9).
3. Form- und Füllstation nach Anspruch 2, dadurch gekennzeichnet, dass die Gassperre (6, 6a, 6b) runde oder mehreckige Querschnittsflächen (9) aufweist, insbesondere dreieckige oder sechseckige Querschnittsflächen. 3. Forming and filling station according to claim 2, characterized in that the gas barrier (6, 6 a, 6 b) has round or polygonal cross-sectional areas (9), in particular triangular or hexagonal cross-sectional areas.
4. Form- und Füllstation nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Gassperre (6, 6a, 6b) Kanäle mit einer coaxialen Anordnung in der Reckstange (1) bildet. 4. Forming and filling station according to one of claims 1 to 3, characterized in that the gas barrier (6, 6a, 6b) channels with a coaxial arrangement in the stretch rod (1).
5. Form- und Füllstation nach Anspruch 4, dadurch gekennzeichnet, dass die Länge (L) eines Kanals größer als der Durchmesser seiner Querschnittsfläche (9) ist. 5. Forming and filling station according to claim 4, characterized in that the length (L) of a channel is greater than the diameter of its cross-sectional area (9).
6. Form- und Füllstation nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Gassperre (6, 6a, 6b) unmittelbar vor der Auslassöffnung (4a, 4b, 4c, 4d) angeordnet ist. 6. Forming and filling station according to one of claims 1 to 5, characterized in that the gas barrier (6, 6a, 6b) directly in front of the outlet opening (4a, 4b, 4c, 4d) is arranged.
7. Form- und Füllstation nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Reckstange (1) über mehrere Auslassöffnungen (4a, 4b, 4c, 4d, 5) an unterschiedlichen Positionen des Strömungskanals (3) verfügt und vor jeder Auslassöffnung (4a, 4b, 4c, 4d, 5) eine Gassperre (6a, 6b) angeordnet ist. 7. Forming and filling station according to one of claims 1 to 6, characterized in that the stretch rod (1) has a plurality of outlet openings (4a, 4b, 4c, 4d, 5) at different positions of the flow channel (3) and in front of each outlet opening (4a, 4b, 4c, 4d, 5) a gas barrier (6a, 6b) is arranged.
8. Reckstange (1) für eine Form- und Füllstation nach einem der Ansprüche 1 bis 7 mit einem Füllgutkanal (3) und mindestens einer Auslassöffnung (4a, 4b, 4c, 4d, 5) zum Auslass von Füllgut, dadurch gekennzeichnet, dass im Füllgutkanal (3) eine Gassperre (6, 6a, 6b) angeordnet ist. 8. stretching rod (1) for a forming and filling station according to one of claims 1 to 7 with a Füllgutkanal (3) and at least one outlet opening (4a, 4b, 4c, 4d, 5) for the outlet of filling material, characterized in that in Füllgutkanal (3) a gas barrier (6, 6a, 6b) is arranged.
9. Reckstange (1) nach Anspruch 8, dadurch gekennzeichnet, dass die Gassperre (6, 6a, 6b) den Querschnitt des Flüssigkeitskanals auf eine Mehrzahl von Querschnittsflächen (9) aufteilt. 9. stretching rod (1) according to claim 8, characterized in that the gas barrier (6, 6a, 6b) divides the cross section of the liquid channel to a plurality of cross-sectional areas (9).
10. Reckstange (1) nach Anspruch 9, dadurch gekennzeichnet, dass die Gassperre (6, 6a, 6b) runde oder mehreckige Querschnittsflächen (9) aufweist, insbesondere dreieckige oder sechseckige Querschnittsflächen. 10. stretch rod (1) according to claim 9, characterized in that the gas barrier (6, 6a, 6b) has round or polygonal cross-sectional areas (9), in particular triangular or hexagonal cross-sectional areas.
11. Reckstangen nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass die Gassperre (6, 6a, 6b) Kanäle mit einer coaxialen Anordnung in der Reckstange (1) bildet. 11. stretching rods according to one of claims 8 to 10, characterized in that the gas barrier (6, 6a, 6b) channels with a coaxial arrangement in the stretch rod (1).
12. Form- und Füllstation nach Anspruch 1 1 , dadurch gekennzeichnet, dass die Länge (L) eines Kanals größer als der Durchmesser seiner Querschnittsfläche (9) ist. 12. Forming and filling station according to claim 1 1, characterized in that the length (L) of a channel is greater than the diameter of its cross-sectional area (9).
13. Reckstange (1) nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass die Gassperre (6, 6a, 6b) unmittelbar vor einer Auslassöffnung (4a, 4b, 4c, 4d) angeordnet ist. 13. stretching rod (1) according to one of claims 8 to 12, characterized in that the gas barrier (6, 6a, 6b) is arranged immediately in front of an outlet opening (4a, 4b, 4c, 4d).
14. Reckstange (1) nach einem der Ansprüche 8 bis 13, dadurch gekennzeichnet, dass die Reckstange (1) über mehrere Auslassöffnungen (4a, 4b, 4c, 4d, 5) an unterschiedlichen Positionen des Strömungskanals (3) verfügt und vor jeder Auslassöffnung (4a, 4b, 4c, 4d, 5) eine Gassperre (6a, 6b) angeordnet ist. 14. stretching rod (1) according to one of claims 8 to 13, characterized in that the stretch rod (1) via a plurality of outlet openings (4a, 4b, 4c, 4d, 5) at different positions of the flow channel (3) has and in front of each outlet opening (4a, 4b, 4c, 4d, 5) a gas barrier (6a, 6b) is arranged.
***** *****
EP17739872.4A 2016-07-29 2017-07-13 Moulding and filling station of an installation for producing filled containers from preforms by means of filling material introduced into the preform under pressure Withdrawn EP3452264A1 (en)

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PCT/EP2017/000832 WO2018019405A1 (en) 2016-07-29 2017-07-13 Moulding and filling station of an installation for producing filled containers from preforms by means of filling material introduced into the preform under pressure

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DE102017010272B3 (en) 2017-11-07 2019-03-21 Khs Corpoplast Gmbh Forming and filling station of a plant for producing filled containers from preforms by introduced under pressure into the preform contents
PL3670144T3 (en) * 2018-12-21 2022-01-31 "Tes" Spółka Z Ograniczoną Odpowiedzialnością A unit for blow-moulding of bottles intended for hot filling from pet preforms

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