DE102007016028A1 - Method for blow molding of containers, involves forming preform made of thermal condensing material in container after thermal condensation along transport path in area of heating section within blow mold by blowing pressure effect - Google Patents
Method for blow molding of containers, involves forming preform made of thermal condensing material in container after thermal condensation along transport path in area of heating section within blow mold by blowing pressure effect Download PDFInfo
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- DE102007016028A1 DE102007016028A1 DE102007016028A DE102007016028A DE102007016028A1 DE 102007016028 A1 DE102007016028 A1 DE 102007016028A1 DE 102007016028 A DE102007016028 A DE 102007016028A DE 102007016028 A DE102007016028 A DE 102007016028A DE 102007016028 A1 DE102007016028 A1 DE 102007016028A1
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- heating
- preforms
- heating section
- preform
- transport path
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Classifications
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- 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
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- 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
- B29C49/64—Heating or cooling preforms, parisons or blown articles
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- 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
- B29C49/122—Drive means therefor
- B29C49/1226—Mechanical
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- 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
- B29C49/4205—Handling means, e.g. transfer, loading or discharging means
- B29C49/42093—Transporting apparatus, e.g. slides, wheels or conveyors
- B29C49/42095—Rotating wheels or stars
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- 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
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
- B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
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- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
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- 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
- B29C49/783—Measuring, controlling or regulating blowing pressure
- B29C2049/7831—Measuring, controlling or regulating blowing pressure characterised by pressure values or ranges
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- 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
- B29C49/783—Measuring, controlling or regulating blowing pressure
- B29C2049/7832—Blowing with two or more pressure levels
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- 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
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- 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
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- 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
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- 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
- B29C49/16—Biaxial stretching during blow-moulding using pressure difference for pre-stretching, e.g. pre-blowing
-
- 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
- B29C49/4205—Handling means, e.g. transfer, loading or discharging means
-
- 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
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
- B29C49/6458—Thermal conditioning of preforms characterised by temperature differential tangentially, i.e. along circumference
-
- 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
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
- B29C49/6835—Ovens specially adapted for heating preforms or parisons using reflectors
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- 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
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
- B29C49/6855—Cooling of heating means, e.g. avoiding overheating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Blasformung von Behältern, bei dem ein Vorformling aus einem thermoplastischem Material nach einer thermischen Konditionierung entlang eines Transportweges im Bereich einer Heizstrecke innerhalb einer Blasform durch Blasdruckeinwirkung in den Behälter umgeformt wird und bei dem der Vorformling mindestens entlang eines Teiles seines Transportweges durch die Heizstrecke von einem Transportelement gehalten wird, das den Vorformling rotationsfähig haltert und bei dem eine Rotationsbewegung des Vorformlings entlang des betreffenden Teiles des Transportweges vorgegeben wird.The The invention relates to a method for blow-molding containers, in which a preform made of a thermoplastic material after a thermal conditioning along a transport path in Area of a heating section within a blow mold by blowing pressure is transformed into the container and in which the preform at least along part of its transport route through the Heating section is held by a transport element, which is the preform rotatably supports and in which a rotational movement of the preform along the relevant part of the transport path is given.
Die Erfindung betrifft darüber hinaus eine Vorrichtung zur Blasformung von Behältern aus einem thermoplastischen Material, die mindestens eine entlang eines Transportweges eines Vorformlings angeordnete Heizstrecke und eine mit einer Blasform versehene Blasstation aufweist, sowie bei der zur Halterung des Vorformlings auf mindestens einem Teil seines Transportweges durch die Heizstrecke ein Transportelement verwendet ist, das den Vorformling rotationsfähig haltert und mit einem Rotationsantrieb gekoppelt ist.The The invention further relates to a device for Blow molding containers made of a thermoplastic material, the at least one along a transport path of a preform arranged heating section and provided with a blow mold blowing station and in which for holding the preform on at least one Part of its transport path through the heating a transport element is used, which rotatably supports the preform and coupled to a rotary drive.
Bei
einer Behälterformung durch Blasdruckeinwirkung werden
Vorformlinge aus einem thermoplastischen Material, beispielsweise
Vorformlinge aus PET (Polyethylenterephthalat), innerhalb einer Blasmaschine
unterschiedlichen Bearbeitungsstationen zugeführt. Typischerweise
weist eine derartige Blasmaschine eine Heizeinrichtung sowie eine
Blaseinrichtung auf, in deren Bereich der zuvor temperierte Vorformling
durch biaxiale Orientierung zu einem Behälter expandiert
wird. Die Expansion erfolgt mit Hilfe von Druckluft, die in den
zu expandierenden Vorformling eingeleitet wird. Der verfahrenstechnische
Ablauf bei einer derartigen Expansion des Vorformlings wird in der
Der
grundsätzliche Aufbau einer Blasstation zur Behälterformung
wird in der
Innerhalb der Vorrichtung zur Blasformung können die Vorformlinge sowie die geblasenen Behälter mit Hilfe unterschiedlicher Handhabungseinrichtungen transportiert werden. Bewährt hat sich insbesondere die Verwendung von Transportdornen, auf die die Vorformlinge aufgesteckt werden. Die Vorformlinge können aber auch mit anderen Trageinrichtungen gehandhabt werden. Die Verwendung von Greifzangen zur Hand habung von Vorformlingen und die Verwendung von Spreizdornen, die zur Halterung in einen Mündungsbereich des Vorformlings einführbar sind, gehören ebenfalls zu den verfügbaren Konstruktionen.Within The apparatus for blow molding, the preforms as well as the blown containers using different ones Handling facilities are transported. proven In particular, the use of transport thorns, to which the preforms are attached. The preforms can but also be handled with other support devices. The usage of tongs for handling preforms and their use of expanding mandrels for holding in a mouth area of the preform are also included to the available constructions.
Eine
Handhabung von Behältern unter Verwendung von Übergaberädern
wird beispielsweise in der
Die bereits erläuterte Handhabung der Vorformlinge erfolgt zum einen bei den sogenannten Zweistufenverfahren, bei denen die Vorformlinge zunächst in einem Spritzgußverfahren hergestellt, anschließend zwischengelagert und erst später hinsichtlich ihrer Temperatur konditioniert und zu einem Behälter aufgeblasen werden. Zum anderen erfolgt eine Anwendung bei den sogenannten Einstufenverfahren, bei denen die Vorformlinge unmittelbar nach ihrer spritzgußtechnischen Herstellung und einer ausreichenden Verfestigung geeignet temperiert und anschließend aufgeblasen werden.The already explained handling of the preforms takes place on the one hand in the so-called two-stage procedure, in which the First, preforms in an injection molding process produced, then stored temporarily and later conditioned in temperature and to a container be inflated. On the other hand, an application in the so-called One-step process in which the preforms immediately after their injection molding production and a sufficient Solidification suitable tempered and then inflated become.
Im Hinblick auf die verwendeten Blasstationen sind unterschiedliche Ausführungsformen bekannt. Bei Blasstationen, die auf rotierenden Transporträdern angeordnet sind, ist eine buchartige Aufklappbarkeit der Formträger häufig anzutreffen. Es ist aber auch möglich, relativ zueinander verschiebliche oder andersartig geführte Formträger einzusetzen. Bei ortsfesten Blasstationen, die insbesondere dafür geeignet sind, mehrere Kavitäten zur Behälterformung aufzunehmen, werden typischerweise parallel zueinander angeordnete Platten als Formträger verwendet.in the With regard to the blowing stations used are different Embodiments known. For blow molding stations that rotate Transport wheels are arranged, is a book-like Aufklappbarkeit the mold carrier frequently encountered. But it is also possible, relative to each other displaceable or different to use guided mold carriers. In fixed Blowing stations, which are particularly suitable for several Cavities for container forming, be typically parallel to each other arranged plates as a mold carrier used.
Vor einer Durchführung der Beheizung werden die Vorformlinge typischerweise auf Transportdorne aufgesteckt, die den Vorformling entweder durch die gesamte Glasmaschine transportieren oder die lediglich im Bereich der Heizeinrichtung umlaufen. Bei einer stehenden Beheizung der Vorformlinge derart, daß die Mündungen der Vorformlinge in lotrechter Richtung nach unten orientiert sind, werden die Vorformlinge üblicherweise auf ein hülsenförmiges Halterungselement des Transportdornes aufgesteckt. Bei einer hängenden Beheizung der Vorformlinge, bei der diese mit ihren Mündungen in lotrechter Richtung nach oben orientiert sind, werden in der Regel Spreizdorne in die Mündungen der Vorformlinge eingeführt, die die Vorformlinge festklemmen.In front One implementation of the heating are the preforms typically attached to transport mandrels that form the preform either through the entire glass machine or the transport only circulate in the area of the heater. In a standing Heating the preforms such that the mouths the preforms are oriented downwards in the vertical direction, The preforms are usually on a sleeve-shaped Retaining element of the transport mandrel attached. In a hanging Heating the preforms, in which these with their mouths are oriented in a vertical direction upwards, are in the Rule spreading mandrels introduced into the mouths of the preforms, which clamp the preforms.
Im Bereich der Heizstrecke besteht eine typische Anforderung darin, in einer Umfangsrichtung der Vorformlinge eine gleichmäßige Temperierung zu erreichen. Bei einer Spezialanwendung, dem sogenannten Preferential Heating, besteht hingegen eine Anforderung darin, eine exakt definierte ungleichmäßige Temperaturverteilung in einer Umfangsrichtung der Vorformlinge vorzugeben. Zur Unterstützung beider Anforderungen erweist es sich als zweckmäßig, die Vorformlinge entlang ihres Transportweges durch die Heizstrecke hindurch in eine Rotation zu versetzen. Diese Rotation kann zur Unterstützung einer gleichmäßigen Temperaturverteilung gleichmäßig oder zur Unterstützung der Generierung eines vorgegebenen Wärmeprofils definiert ungleichmäßig sein.In the area of the heating section, a typical requirement is to achieve a uniform temperature control in a circumferential direction of the preforms. In a special application, the so-called Preferential Heating, however, there is a Requirement is to specify a precisely defined uneven temperature distribution in a circumferential direction of the preforms. To support both requirements, it proves useful to put the preforms along their transport path through the heating section in a rotation. This rotation may be uniform to support a uniform temperature distribution, or may be unevenly defined to support the generation of a given thermal profile.
Eine Möglichkeit zur Einbringung derartiger Rotationsbewegungen in die Vorformlinge besteht darin, ein Tragelement für die Vorformlinge mit einem Zahnrad zu versehen, das in einer Kette abrollt, die sich entlang des Transportweges des Vorformlinges erstreckt. Eine derartige Kette kann unbeweglich angeordnet sein, so daß die Umfangsgeschwindigkeit der Vorformlinge direkt von deren Translationsgeschwindigkeit abhängt. Es ist aber ebenfalls bereits bekannt, eine derartige Kette mit einem Antrieb zu versehen, so daß die Kette entlang von Führungselementen umläuft.A Possibility to introduce such rotational movements in the preforms is a support element for to provide the preforms with a gear that is in a chain rolls, which extends along the transport path of the preform. Such a chain can be arranged immovable, so that the Peripheral speed of the preforms directly from their translation speed depends. But it is also already known, such Chain provided with a drive, so that the chain along of guide elements rotates.
Zur Generierung des Wärmeprofils in einer Umfangsrichtung des Vorformlings durch die vorstehend erläuterte Modulation der Rotationsgeschwindigkeit der Vorformlinge entsteht ein relativ hoher maschinenbaulicher Aufwand. Es ist ebenfalls bereits bekannt, durch Heizelemente, die in einer Transportrichtung der Vorformlinge mit einem Abstand zueinander angeordnet sind, ein örtliches Temperaturprofil bereitzustellen, wobei die Abstände der Heizelemente, die Translationsgeschwindigkeit der Vorformlinge und deren Rotationsgeschwindigkeit aufeinander abgestimmt werden müssen, um das Temperaturprofil in Umfangsrichtung zu generieren. Die Abstimmung dieser drei Parameter macht das bekannte Verfahren äußerst unflexibel, darüber hinaus vergrößern die Abstände zwischen den Heizelementen die Länge der Heizstrecke.to Generation of the heat profile in a circumferential direction of the Preform by the above-described modulation The rotational speed of the preforms arises a relative high mechanical engineering effort. It is also already known by heating elements in a transport direction of the preforms are arranged at a distance to each other, a local To provide temperature profile, wherein the distances of the Heating elements, the translation speed of the preforms and whose rotational speed must be coordinated with each other, to generate the temperature profile in the circumferential direction. The vote of this three parameters makes the known method extremely inflexible, beyond enlarge the distances between the heating elements the length of Heating section.
Aufgabe der vorliegenden Erfindung ist es, ein Verfahren der einleitend genannten Art derart zu verbessern, daß mit geringem maschinenbaulichen Aufwand eine qualitativ hochwertige Beheizung unterstützt wird.task It is the object of the present invention to provide a method of the mentioned type to improve such that with little mechanical engineering effort a high quality heating is supported.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß eine Heizleistung mindestens eines Teiles der Heizstrecke koordiniert zur Rotationsbewegung der Vorformlinge zyklisch verändert wird.These The object is achieved according to the invention that a heating power of at least a portion of the heating section coordinated to the rotational movement of the preforms cyclically changed becomes.
Weitere Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung der einleitend genannten Art derart zu konstruieren, daß hohe Durchsatzraten bei einem einfachen konstruktiven Aufbau unterstützt werden.Further Object of the present invention is to provide a device of Initially mentioned type such that high Throughput rates are supported in a simple structural design.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß mindestens ein im Bereich der Heizstrecke angeordnetes Heizelement an eine Steuerung angeschlossen ist, die eine zeitlich veränderliche Heizleistung koordiniert zu einer Rotationsbewegung der Vorformling vorgibt.These The object is achieved according to the invention that at least one arranged in the region of the heating section Heating element is connected to a controller, which one time variable heating power coordinated to a rotational movement the preform pretends.
Die Modulation der Heizleistung koordiniert zur Rotationsbewegung der Vorformlinge ermöglicht es, eine kompakte Anordnung der einzelnen Heizelemente beizubehalten und in Abhängigkeit von der Rotationsbewegung der Vorformlinge einzelne Umfangsbereiche stärker und andere Umfangsbereiche weniger stark zu beheizen. Die konkrete Art und Weise der Modulation der Heizleistung kann über die Maschinensteuerung vorgegeben und über ein Bediensystem verändert werden. Es wird hierdurch ein sehr flexibles System bereitgestellt, das ohne mechanische Umbauarbeiten an unterschiedliche Anwendungsanforderungen angepaßt werden kann.The Modulation of heating power coordinated to the rotational movement of Preforms allows a compact arrangement of to maintain individual heating elements and depending from the rotational movement of the preforms individual peripheral areas stronger and other peripheral areas less to heat. The concrete way of modulating the heating power can over the machine control predetermined and via an operating system to be changed. It makes this a very flexible System provided that without mechanical alterations to different Application requirements can be adjusted.
Ein typischer Verfahrensablauf erfolgt dadurch, daß die Heizleistung relativ zu einem Mittelwert zyklisch erhöht und erniedrigt wird.One typical procedure takes place in that the heating power cyclically increased and decreased relative to a mean value becomes.
Eine einfache maschinenbauliche Realisierung wird dadurch unterstützt, daß die Vorformlinge mindestens entlang eines Teiles ihres Transportweges durch die Heizstrecke hindurch mit einer konstanten Umdrehungszahl rotieren.A simple mechanical engineering is supported by that the preforms at least along part of their Transport path through the heating section through with a constant Rotate the number of revolutions.
Die Ableitung einer Rotationsbewegung der Vorformlinge von einer vorgegebenen Translationsbewegung kann dadurch erfolgen, daß Transportelemente für die Vorformlinge mit einem Profil in ein Profilelement eingreifen und an diesem abrollen.The Derivation of a rotational movement of the preforms of a given Translational movement can take place in that transport elements for the preforms with a profile in a profile element intervene and roll on this.
Verbesserte Möglichkeiten zur Vorgabe einer Rotationsgeschwindigkeit der Vorformlinge können dadurch erreicht werden, daß das Profilelement umlaufend angetrieben ist.improved Possibilities for specifying a rotational speed The preforms can be achieved in that the Profile element is driven circumferentially.
Eine einfache Verfahrensdurchführung wird dadurch unterstützt, daß alle Heizelemente im Bereich der Heizstrecke gleichzeitig hinsichtlich ihrer abgegebenen Heizleistungen moduliert werden.A simple process implementation is supported by that all heating elements in the heating zone at the same time be modulated in terms of their output heat outputs.
Eine Verfahrensoptimierung kann dadurch erreicht werden, daß zumindest ein Heizelement mit einer gleichmäßigen Betriebsleistung und mindestens ein weiterer Heizstrahler mit einer zeitlich variierenden Heizleistung betrieben werden.A Process optimization can be achieved by at least a heating element with a consistent operating performance and at least one further radiant heater having a time varying one Heating power to be operated.
Kurze Temperierungszeiten können dadurch erreicht werden, daß in einem ersten Bereich die Heizstrecke mit konstant betriebenen Heizstrahlern eine Grundtemperatur der Vorformlinge erzeugt und von in Transportrichtung hinter dieser Grundtemperierung angeordneten weiteren Heizstrahlern mit zeitlich variierender Heizleistung das Temperaturprofil erzeugt wird.short Temperierungszeiten can be achieved that in a first area the heating section with a constant operated radiant heaters Basic temperature of the preforms produced and from in the transport direction behind this Grundtemperierung arranged further radiant heaters generates the temperature profile with temporally varying heating power becomes.
Insbesondere erweist es sich als vorteilhaft, daß ausschließlich diejenigen Heizstrahler, die in einem Abschnitt der Heizstrecke zur Generierung des Temperaturprofils der Vorformlinge in deren Umfangrichtung angeordnet sind, mit einer zeitlich variierenden Heizleistung betrieben werden.Especially it proves to be advantageous that exclusively those radiant heaters that are in a section of the heating section for generating the temperature profile of the preforms in their Circumferential direction are arranged, with a time varying Heating power to be operated.
Eine Variation der Heizleistung mit geringer thermischer Trägheit wird dadurch unterstützt, daß mindestens die Heizleistung eines Heizstrahlers moduliert wird, der Heizstrahlung im NIR-Bereich abstrahlt.A Variation of heating power with low thermal inertia is supported by the fact that at least the heating power a radiant heater is modulated, the heating radiation in the NIR range radiates.
In den Zeichnungen sind Ausführungsbeispiele der Erfindung schematisch dargestellt. Es zeigen:In The drawings are embodiments of the invention schematically shown. Show it:
Der
prinzipielle Aufbau einer Vorrichtung zur Umformung von Vorformlingen
(
Die
Vorrichtung zur Formung des Behälters (
Zur
Ermöglichung einer Druckluftzuleitung ist unterhalb des
Transportdornes (
Eine
Reckung des Vorformlings (
Bei
der in
Nach
einem Schließen der im Bereich von Trägern (
Zur
Anpassung an unterschiedliche Formen eines Mündungsabschnittes
(
Um
einen Vorformling (
Als thermoplastisches Material können unterschiedliche Kunststoffe verwendet werden. Einsatzfähig sind beispielsweise PET, PEN oder PP.When thermoplastic material can be different plastics be used. Useful are, for example, PET, PEN or PP.
Die
Expansion des Vorformlings (
Aus
Zur
Ermöglichung einer möglichst dichten Anordnung
des Übergaberades (
Nach
einem fertigen Blasen der Behälter (
In
der in
Zur
Erzeugung eines Temperaturprofils in einer Umfangsrichtung der Vorformlinge
(
Bei
einer Verwendung von Ketten oder Zahnriemen ist es möglich,
diese ortsfest anzuordnen. Darüber hinaus ist aber auch
gedacht, diese Elemente mit einem Antrieb zu koppeln, so daß größere Drehzahlen
für die Vorformlinge (
Die
gemäß
Zur
Realisierung eines Heizleistungsprofils gemäß
Im
Anschluß an die Erzeugung des Temperaturprofils im Bereich
der Vorformlinge (
Die
Erzeugung des Temperaturprofils im Bereich der Vorformlinge (
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 4340291 A [0003] - DE 4340291 A [0003]
- - DE 4212583 A [0004] - DE 4212583 A [0004]
- - DE 2352926 A [0004] - DE 2352926 A [0004]
- - DE 19906438 A [0006] - DE 19906438 A [0006]
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007016028A DE102007016028A1 (en) | 2007-03-30 | 2007-03-30 | Method for blow molding of containers, involves forming preform made of thermal condensing material in container after thermal condensation along transport path in area of heating section within blow mold by blowing pressure effect |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007016028A DE102007016028A1 (en) | 2007-03-30 | 2007-03-30 | Method for blow molding of containers, involves forming preform made of thermal condensing material in container after thermal condensation along transport path in area of heating section within blow mold by blowing pressure effect |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007016028A1 true DE102007016028A1 (en) | 2008-10-16 |
Family
ID=39744094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007016028A Withdrawn DE102007016028A1 (en) | 2007-03-30 | 2007-03-30 | Method for blow molding of containers, involves forming preform made of thermal condensing material in container after thermal condensation along transport path in area of heating section within blow mold by blowing pressure effect |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102007016028A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2253453A1 (en) * | 2009-05-19 | 2010-11-24 | Krones AG | Method and tempering device for heating preforms before they are formed into containers |
DE102010015019A1 (en) | 2010-04-14 | 2011-10-20 | Krones Ag | Premold for producing e.g. polyethylene terephthalate bottle, utilized for filling beverage, has hollow body comprising outer and inner surfaces, where region with absorption or reflection for thermal radiation is arranged on surfaces |
EP2390082A1 (en) * | 2010-05-25 | 2011-11-30 | Krones AG | Apparatus and method for controlling and/or regulating temperature of a heating device for preforms |
EP2454066B1 (en) | 2009-07-16 | 2018-03-07 | KHS Corpoplast GmbH | Method and device for blow-molding containers |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2352926A1 (en) | 1973-10-22 | 1975-04-24 | Heidenreich & Harbeck Gmbh | METHOD AND DEVICE FOR HEATING A WORKPIECE MADE OF PLASTIC |
DE4212583A1 (en) | 1992-04-15 | 1993-10-21 | Krupp Corpoplast Masch | Blow molding device |
DE4340291A1 (en) | 1993-11-26 | 1995-06-01 | Krupp Corpoplast Masch | Multiple use of blown air |
DE19906438A1 (en) | 1999-02-16 | 2000-08-17 | Krupp Corpoplast Masch | Transfer of thermoplastic containers on a blow molding plant, by a swivel movement of a container holder at the transfer point between blowing and output wheels |
-
2007
- 2007-03-30 DE DE102007016028A patent/DE102007016028A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2352926A1 (en) | 1973-10-22 | 1975-04-24 | Heidenreich & Harbeck Gmbh | METHOD AND DEVICE FOR HEATING A WORKPIECE MADE OF PLASTIC |
DE4212583A1 (en) | 1992-04-15 | 1993-10-21 | Krupp Corpoplast Masch | Blow molding device |
DE4340291A1 (en) | 1993-11-26 | 1995-06-01 | Krupp Corpoplast Masch | Multiple use of blown air |
DE19906438A1 (en) | 1999-02-16 | 2000-08-17 | Krupp Corpoplast Masch | Transfer of thermoplastic containers on a blow molding plant, by a swivel movement of a container holder at the transfer point between blowing and output wheels |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2253453A1 (en) * | 2009-05-19 | 2010-11-24 | Krones AG | Method and tempering device for heating preforms before they are formed into containers |
US9370874B2 (en) | 2009-05-19 | 2016-06-21 | Krones Ag | Method and tempering device for heating preforms prior to molding the same to form containers |
EP2454066B1 (en) | 2009-07-16 | 2018-03-07 | KHS Corpoplast GmbH | Method and device for blow-molding containers |
DE102010015019A1 (en) | 2010-04-14 | 2011-10-20 | Krones Ag | Premold for producing e.g. polyethylene terephthalate bottle, utilized for filling beverage, has hollow body comprising outer and inner surfaces, where region with absorption or reflection for thermal radiation is arranged on surfaces |
EP2390082A1 (en) * | 2010-05-25 | 2011-11-30 | Krones AG | Apparatus and method for controlling and/or regulating temperature of a heating device for preforms |
EP2390083A1 (en) * | 2010-05-25 | 2011-11-30 | Krones AG | Apparatus and method for controlling and/or regulating temperature of a heating device for preforms |
DE102010021445A1 (en) * | 2010-05-25 | 2011-12-01 | Krones Ag | Method and device for temperature control and / or regulation of a preform heater |
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