AT504967A1 - METHOD FOR PRODUCING A BEVERAGE CAN - Google Patents
METHOD FOR PRODUCING A BEVERAGE CAN Download PDFInfo
- Publication number
- AT504967A1 AT504967A1 AT0008807A AT882007A AT504967A1 AT 504967 A1 AT504967 A1 AT 504967A1 AT 0008807 A AT0008807 A AT 0008807A AT 882007 A AT882007 A AT 882007A AT 504967 A1 AT504967 A1 AT 504967A1
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- mold
- beverage
- producing
- injection mold
- injection
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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
- B29C49/02—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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/567—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
- B29C65/568—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
- B29C66/1352—Single hem to hem joints
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
- B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
- B29C66/545—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
- B65D15/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
- B65D15/16—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of plastics material
- B65D15/18—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of plastics material with end walls made of metal
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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
- 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
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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
- B29C2049/7879—Stretching, e.g. stretch rod
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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
- B29C2791/00—Shaping characteristics in general
- B29C2791/001—Shaping in several steps
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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
- B29C49/087—Means for providing controlled or limited stretch ratio
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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
- B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
- B29C49/428—Joining
- B29C49/42802—Joining a closure or a sealing foil to the article or pincing the opening
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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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/34—Rim rolling
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
- B29C66/7316—Surface properties
- B29C66/73161—Roughness or rugosity
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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
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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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/02—Aluminium
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- 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
- B29L2031/716—Bottles of the wide mouth type, i.e. the diameters of the bottle opening and its body are substantially identical
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- 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
- B29L2031/717—Cans, tins
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Dosenkörpers bzw. insbesondere einer Getränkedose aus Kunststoff, welche dadurch gekennzeichnet ist, dass ein Dosenkörper beliebiger Form über einen größeren Durchmesser verfügt als der Dosenhals, sowie dafür eine Herstellungsvorrichtung, insbesondere eine Spritzgussform, in welcher diese Getränkedosen innerhalb dieser Form am gleichen Produktionsort ohne Platzwechsel in einem einzigen Produktionsdurchgang auf das Endmaß fertig gestellt und anschließend entformt werden können.The invention relates to a method for producing a can body or in particular a beverage can made of plastic, which is characterized in that a can body of any shape has a larger diameter than the can neck, and for a manufacturing device, in particular an injection mold, in which these beverage cans within This form can be completed at the same place of production without changing place in a single production pass on the final dimension and then removed from the mold.
Aus dem Stand der Technik sind Behältnisse aus Kunststoff zur Aufnahme von Getränken bereits bekannt, insbesondere werden Getränkeflaschen aus Kunststoff, aus PET (Polyethylenterephthalat) für die Aufnahme von Mineralwasser, Limonaden, Fruchtsäfte, etc., verwendet. Diese „PET Flaschen“ werden üblicherweise aus kleinen, vorgefertigten annähernd zylinderförmigen „PET Rohlingen“ in einer Blasmaschine mittels Druckluft innerhalb einer Blasform auf deren Endmaß geblasen, nachdem diese mit einem hohen Energieaufwand unmittelbar davor auf die erforderliche Verformtemperatur erhitzt worden sind. Ein Voraussetzung dafür ist allerdings, dass der „Preform Rohling“ bereits über den fertigen, mit einem Schraubverschluss versehenen Flaschenhals verfügt, welcher über eine ausreichende Größe und eine hohe Festigkeit verfügt, um somit den Rohling in der Blasform zum Aufblasen fest genug einspannen zu können. Nachdem die „PET Flaschen“ in der Blasenform deren Endabmessung erreicht haben, können diese durch deren Hinterschneidung (der Flaschenbauch ist größer als der von oben eingebrachte Flaschenhals des ursprünglichen zylindrischen Rohlings), nicht mehr nach oben aus der Form gezogen (entformt) werden, sondern vielmehr muss die Form aus zumindest zwei Hälften bestehen, welche zur Entformung auseinandergefahren werden, wodurch die fertige „PET Flasche“ aus der Form herausfällt. Es ist aber auch bekannt und Stand der Technik, dass Getränke wie zum Beispiel Bier, Cola, Limonaden, etc., in Aluminium Dosen genormter Größen abgefüllt werden. Der dafür eingesetzte Rohstoff Aluminium ist nun einerseits gut zu verarbeiten, dessen Ressourcen werden aber durch immer größere Nachfrage am Weltmarkt zusehends mehr und mehr aufgebraucht, darüber hinaus ist das Herstellungsverfahren von Aluminium Getränkedosen sehr aufwändig und in Bezug auf die extrem hohen Investitionskosten für eine entsprechende Herstellungsanlage weltweit auf wenige Hersteller beschränkt.Containers made of plastic for receiving beverages are already known from the prior art, in particular beverage bottles made of plastic, of PET (polyethylene terephthalate) for the absorption of mineral water, lemonades, fruit juices, etc., are used. These "PET bottles" are usually blown from small, prefabricated approximately cylindrical "PET blanks" in a blow molding machine by means of compressed air within a blow mold on the final dimension, after they have been heated with a high energy expenditure immediately before the required deformation temperature. A prerequisite for this is, however, that the "preform blank" already has the finished, screw-capped bottle neck, which has a sufficient size and high strength, so as to clamp the blank in the blow mold to inflate tight enough. After the "PET bottles" have reached the final shape in the bubble shape, they can by their undercut (the bottle belly is larger than the top of introduced bottleneck of the original cylindrical blank), no longer pulled upwards out of the mold (demoulded), but Rather, the mold must consist of at least two halves, which are moved apart for demolding, whereby the finished "PET bottle" falls out of the mold. However, it is also known and state of the art that beverages such as beer, cola, sodas, etc., are filled in aluminum cans of standardized sizes. The raw material aluminum used for this is now on the one hand to process well, but its resources are increasingly consumed by ever increasing demand on the world market more and more, in addition, the manufacturing process of aluminum beverage cans is very complex and in terms of extremely high investment costs for a corresponding manufacturing plant limited to a few manufacturers worldwide.
Ein weiterer Nachteil der Alu Dose liegt in der geringen Festigkeit, wodurch eine befüllte Getränkedose ausschließlich durch den darin herrschenden Gasdruck mechanisch gegen Beschädigung stabilisiert werden kann. Weiters ist auch jede leere Getränkedose vor deren Befüllung auf Grund der geringen mechanischen Festigkeit äußerst anfällig auf mechanische Beschädigung auf deren gesamter Oberfläche bis hin zum Deckelfalz.Another disadvantage of the aluminum can is the low strength, whereby a filled beverage can only be mechanically stabilized against damage by the prevailing gas pressure therein. Furthermore, any empty beverage can prior to its filling due to the low mechanical strength is extremely prone to mechanical damage on the entire surface up to the lid fold.
Auf Grund der großen Verfügbarkeit von entsprechenden Kunstoffen als Ausgangsmaterial für eine Getränkedose sowie der höheren Verformungsfestigkeit derselben, und darüber hinaus der üblicherweise weit geringeren Kosten einer Kunststoffverarbeitung bietet sich dieser Grundstoff in idealerWeise für Getränkedosen an.Due to the high availability of corresponding plastics as a starting material for a beverage can and the higher deformation resistance of the same, and moreover, the usually far lower cost of plastics processing, this base material is ideally suited for beverage cans.
Es ist aber bis heute grundsätzlich nicht möglich, eine Kunststoffdose in einem einzigen Produktionsdurchgang herzustellen, die der Aluminium Dose insbesondere in den Standardabmessungen gleichkommt, in dem man einen „Rohling“ einer Kunststoffdose in eine Blasform zum Erhitzen und Aufblasen einbringt, weil eine Standard Dose über keinen Schraubverschluss verfügt und somit könnte ein allfälliger Rohling auch nicht in eine Blasform eingespannt werden, vielmehr verfügt • · 3- eine Getränkedose an deren Oberseite über einen äußerst sensiblen und sehr dünnwandigen Verrollungssteg zur Verbindung mit dem Alu-Deckel, wobei bereits schon eine geringfügige Verletzung dieses Steges am Dosenhals zu einem so genannten „Dead Seam“im verschlossen Zustand der Dose mit folgender Undichtheit führen kann, was möglicherweise auch der Grund dafür ist, dass bis heute keine „Dosenpreforms“ bzw. „Dosenblasmaschinen“ bekannt sind.However, it is still not possible in principle to produce a plastic can in a single production run, which equals the aluminum can, especially in the standard dimensions, in which one brings a "blank" of a plastic can in a blow mold for heating and inflation, because a standard can over There is no screw cap and thus a possible blank could not be clamped in a blow mold, but rather has a beverage can at the top of a very sensitive and very thin-walled Verrollungssteg for connection to the aluminum lid, which already has a minor injury This bar on the can neck to a so-called "Dead Seam" in the closed state of the can with the following leakage can lead, which may also be the reason that to date no "Dosenpreforms" or "Dosenblasmaschinen" are known.
Die Einhaltung aller wichtigen Abmessungen einer neuartigen Kunststoffgetränkedose ist darüber hinaus auch deshalb sehr wichtig, weil einerseits auch eine Kunststoffgetränkedose weltweit auf allen gängigen, genormten Dosenfüllmaschinen zu befüllen sein muss, und andererseits der Konsument bei fertig gefüllten Produkten auch die gleiche Inhaltsmenge erwartet wie in einer gleich großen Alu-Dose.The compliance with all the important dimensions of a novel plastic beverage can is also very important because on the one hand, a plastic beverage can be filled worldwide on all standard, standardized can filling machines, and on the other hand, the consumer expected in finished products and the same content as in the same big aluminum can.
Darüber hinaus muss die Getränkedose so beschaffen sein, dass auf dieser vorzugsweise die weltweit verwendeten Standard Alu-Deckel als Verschluss verwendet werden können. Es sind ja weltweit auch alle Dosenverschließmaschinen auf diese Deckelnorm abgestimmt.In addition, the beverage can must be such that it can be used on this preferably the standard aluminum lids used worldwide as a closure. There are worldwide tuned all can sealing machines on this cover standard.
Der Erfindung liegt somit die Aufgabe zugrunde, ein Herstellungsverfahren bzw. eine Herstellungsvorrichtung für die Herstellung von Kunststoffgetränkedosen der eingangs erwähnten Art zu schaffen, welche es ermöglicht, mittels einer dafür vorgesehenen Spritzgussform eine Getränkedose von beliebiger Hinterschneidungsform an dessen Ursprungsort innerhalb der Spritzgussform fertigzustellen und diese einwandfrei zu entformen. • · • · • · · • ·♦· « · · · • ♦ • # · · · -4-The invention is therefore an object of the invention to provide a manufacturing method or a manufacturing device for the production of plastic beverage cans of the type mentioned, which makes it possible to complete by means of a dedicated injection mold a beverage can of any undercut at its origin within the injection mold and this flawlessly to demould. • • • • • • • • • ♦ • «· · · • ♦ • # · · · -4-
Zur Lösung dieser Aufgabe sieht die Erfindung vor, dass eine mehrteilige Standardspritzgussform, welche auch als Backenwerkzeug bezeichnet wird, über zumindest ein Formbild bzw. in einerweiteren bevorzugten Ausführungsform über eine Reihe von Formbildern verfügt, vorzugsweise jedoch eine Einheit aus zumindest zwei Reihen mit jeweils wiederum mit einer Anzahl von Formbildem von Getränkedosen besteht, und wobei jedes Formbildes dieser Spritzgussform über einen am beweglichen Oberteil (1) der Spritzgussform angebrachten Kern (2) verfügt, und wobei weiters jedes Formbild über eine zylinderförmige innerhalb des Formbildes bewegliche Metallhülse (25) verfügt, welche auf der/Auswerferseite durch den Führungsschlitz (23) in das Formbild hinein bis zum oberen Abschlag (24) bewegt wird und diesen dichtend abschließt, und wobei die Getränkbdose innerhalb desselben Formbildes ohne Zwischenentnahme in zwei Schritten hergestellt wird. Weitere Vorteile und Ausgetaltungen der Erfindung ergeben sich aus der Beschreibung und den beiliegenden Zeichnungen. Die Erfindung ist anhand von Ausführungsbeispielen in den Zeichnungen schematisch dargestellt und wird im / Folgenden unter Bezugnahme auf die Zeichnungen beispielsweise beschrieben.To achieve this object, the invention provides that a multi-part standard injection mold, which is also referred to as a jaw tool, has at least one molding or in a further preferred embodiment a number of form images, but preferably a unit of at least two rows, each with turn wherein each mold pattern of this injection mold has a core (2) attached to the movable top (1) of the injection mold, and further wherein each mold pattern has a cylindrical metal sleeve (25) movable within the mold pattern is moved on the / ejector side through the guide slot (23) in the shape of the picture into the upper tee (24) and this sealingly closes, and wherein the beverage can is made within the same shape image without intermediate removal in two steps. Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings. The invention is illustrated schematically by means of embodiments in the drawings and is described in the following with reference to the drawings, for example.
Fig.1 Querschnitt durch die Spritzgussform bzw. durch ein Formbild bewegliche Hülse 25 (schraffiert)in oberer Position,1 cross-section through the injection mold or by a molding image movable sleeve 25 (hatched) in the upper position,
Fig.2 Querschnitt durch die Spritzgussform bzw. durch ein Formbild vorgefertigte gespritzte Dose (schraffiert),2 cross-section through the injection mold or through a molding prefabricated injection-molded box (hatched),
Fig.3 Querschnitt durch die Spritzgussform bzw. durch ein Formbild bewegliche Hülse 25 (schraffiert)in unterer Position,3 shows a cross-section through the injection mold or through a molding image movable sleeve 25 (hatched) in the lower position,
Fig.4 Querschnitt durch die Spritzgussform bzw. durch ein Formbild Kunststoffdose fertig geblasen, fertig zur Entformung,4 cross-section through the injection mold or through a molding image plastic can finished blown, ready for demolding,
Fig. 5 Axialer Antrieb der beweglichen Stahlhülse 25. • · • · · · t · · · • · · · · · ··· ·· · · • ·· · · · · ·· · ···· • ·· ·· ·· ♦· · · -5-Fig. 5 Axial drive of the movable steel sleeve 25. • ························································································· ·· ·· ♦ · · · -5-
Figur 1 zeigt einen Querschnitt durch eine beispielhafte Spritzgussform, welche aus dem beweglichen Formoberteil 1 besteht, welcher im Bereich der Trennebene 29 -29’ an den beiden seitlich verfahrbaren Backeneinheiten 3 und 4 in unterer Endlage dichtend aufliegt, und wobei vom Formoberteil der an diesem befestigte Kern 2 in das Formbild 16 mit einem Wandstärkenabstand 19 bis an die untere Begrenzung 13 des Formbildes eingebracht wird, der Abstand zwischen den beiden Begrenzungsflächen 12 und 13 ergibt somit die Wandstärke 19 des Dosenbodens bzw. befindet sich darüber hinaus auch bereits im richtigen Abstand 34 (Fig.4) einer fertigen Getränkedose, das heißt bezüglich der Bauhöhe einer Dose ist kein Blasvorgang mehr erforderlich, sowie die Dicke 19 des Dosenbodens verfügt bereits über das Endmaß. In der Spritzgussform befindet sich weiters eine angetriebene, nach oben bzw. unten verfahrbarer hülsenartiger, oben und unten offener Metallzylinder, welcher, wenn er sich in der oberen Position befindet, in Höhe des beispielhaften Punktes 24 die entsprechende Umfangslinie abdichtet und den Hohlraum des Formbildes somit in zwei neue voneinander getrennte Hohlräume, nämlich den innerhalb der Metallhülse 25 befindlichen Raum 8 und den außerhalb der Metallhülse befindlichen Raum 16 mechanisch trennt.Figure 1 shows a cross section through an exemplary injection mold, which consists of the movable upper mold part 1, which in the region of the parting plane 29 -29 'on the two laterally movable jaw units 3 and 4 sealingly rests in the lower end position, and wherein the upper part of the form attached to this Core 2 is introduced into the mold 16 with a wall thickness distance 19 to the lower boundary 13 of the mold image, the distance between the two boundary surfaces 12 and 13 thus results in the wall thickness 19 of the can bottom or is also already at the correct distance 34 (FIG. 4) of a finished beverage can, that is with respect to the overall height of a can no longer blowing process is required, and the thickness 19 of the can bottom already has the final dimension. In the injection mold is also a driven, movable up or down sleeve-like, top and bottom open metal cylinder, which, when it is in the upper position, at the level of the exemplary point 24 seals the corresponding circumference and thus the cavity of the mold image in two new separate cavities, namely located within the metal sleeve 25 space 8 and the outside of the metal shell space 16 mechanically separates.
Der innere Hohlraum mit den Abschnitten 21, 8,19,17,22 ist der Bereich in dem die Kunststoffdose als weitgehend fertige Vorform gespritzt wird, und zwar stellen die Bereiche 21 und 22 den Dosenhals dar, die Bereiche 8 und 17 den seitlichen Dosenkörper und 23 betrifft den Dosenboden. Da es sich bei Getränkedosendosen um dünnwandige Teile handelt, erfolgt die Kühlung zum Abtransport der Wärme über den Kernbereich 2. Die Spritzgussform verfügt weiters über eine Freistellung, gemäß Fig. 1 sind dies die beiden Flächen 14 und 15 des Schnittbildes, wobei diese ·· ·· ·· ·· ·· · • ·· ·· ·· · ·· • · · · · · ··· ·« · ι • ·· ·· I t · · « ···· • ·· ·· ·· ·· · · ·· ·· ·· ·· ·· · -6-The inner cavity with the sections 21, 8,19,17,22 is the area in which the plastic can is injected as a largely finished preform, namely the areas 21 and 22 represent the can neck, the areas 8 and 17, the side can body and 23 relates to the bottom of the can. Since beverage can cans are thin-walled parts, the cooling takes place for the removal of the heat via the core region 2. The injection mold furthermore has an exemption, as shown in FIG. 1 these are the two surfaces 14 and 15 of the sectional image, whereby these ··· ····· ···· ·· ·· ····································
Freistellung dafür vorgesehen ist, um darin die Metallhülse 25 (Fig.4) nach unten zu verfahren und damit den Blasraum 16 (Fig.1) freizugeben, ohne die Spritzgussform öffnen zu müssen und mit dem weiteren erfindungsgemäßen Vorteil, dass der verletzbare, dünnwandige Dosenhals zwischen dem Spritzvorgang und dem Blasvorgang, im Schnittbild dargestellt durch die beiden Schnitte 21 und 22, zwischen den Formteilen 1 sowie 3 und 4 eingespannt bleibt und somit auch keinen stabilen Flaschenhals benötigt wie eine „PET Flasche“, wobei sich weiters die Getränkedose beim Blasvorgang darüber hinaus auch an der Bodenfläche 13 (Fig.1) abstützen kann und somit auch keine Dehnung des Dosenhalses erfolgt.Provision is made for this to move down the metal sleeve 25 (Figure 4) and thus release the blast chamber 16 (Figure 1) without having to open the injection mold and with the further inventive advantage that the vulnerable, thin-walled can neck between the injection process and the blowing process, shown in the sectional view by the two sections 21 and 22, clamped between the mold parts 1 and 3 and 4 and therefore also no stable bottle neck needed as a "PET bottle", which further the beverage can during the blowing process about it can also be supported on the bottom surface 13 (Figure 1) and thus no elongation of the can neck takes place.
Durch die beispielhafte Anordnung Öffnung 35, Druckleitung 27, Ausblasventil 28 (Fig.3) wird Druckluft in den noch heißen, verformbaren Kunststoffteil eingepresst, wodurch sich die Kunststoffwände 18 (Fig.4) seitlich an den Mantel 10,11, der Dosenform anlegen, wie eben bei einer Blasform.By the exemplary arrangement opening 35, pressure line 27, purge valve 28 (Figure 3) compressed air is pressed into the still hot, deformable plastic part, whereby the plastic walls 18 (Figure 4) laterally to the coat 10,11, create the can shape, as with a blow mold.
Das Ergebnis ist eine Kunststoffdose, welche korrekte Maße bezüglich der Dosenhöhe und des Durchmessers des Dosenhalses aufweist, weil diese Werte durch das Kunststoffspritzgussverfahren sehr genau erzielt werden können, und welche weiters über eine beliebige bauchige Dosenkörperform durch das Blasverfahren verfügen können.The result is a plastic can having correct dimensions in terms of can height and diameter of the can neck, because these values can be obtained very accurately by the plastic injection molding process, and which furthermore can have any bulbous can body shape through the blow molding process.
Zur Entformung wird gern. Fig.4 zunächst das Oberteil 1 im Bereich der beispielhaften Trennebene AB in Pfeilrichtung 32 angehoben, das ist insbesondere deswegen sehr leicht möglich, weil diese Bewegung durch keine Hinterschneidung eines Dosenkerns 2 behindert wird, in weiterer Folge werden die beiden Backenhälften 3 und 4 im Bereich der beispielhaften Trennachse CD auseinander gezogen, und zwar Teil 3 in Pfeilrichtung 30 und Teil 4 in Pfeilrichtung 31 sowie anschließend wird die Metallhülse 25 wiederum nach oben geschoben, was den ·· ·· ·· ·· ·· · • · · · ♦ ·· · «· • · · · · · ··· ·· · · • · t · · · · ·· « ···· • ·· ·· ·· ·· · · ·· ·· ·· ♦ · ·· · -7-For demoulding will like. 4, the upper part 1 in the region of the exemplary parting plane AB raised in the direction of arrow 32, this is particularly easy because this movement is hindered by no undercut a can core 2, as a result, the two jaw halves 3 and 4 in the area the exemplary separation axis CD pulled apart, namely part 3 in the direction of arrow 30 and part 4 in the direction of arrow 31 and then the metal sleeve 25 is pushed up again, which the ·················· · · «· · · · · · · · · · · · · · · · · · · ··············································································· ·· · -7-
Effekt hat, dass die Hülse 25 als ein Auswerfer wirkt und somit die Getränkedose im Bereich der Kreisbahn 20 (Fig.4) berührt und dadurch aus der Spritzgussform, insbesondere aus dem Formbild herausschiebt, bzw. auswirft. Ab diesem Zeitpunkt wiederholt sich der Vorgang zyklisch.Has the effect that the sleeve 25 acts as an ejector and thus the beverage can in the region of the circular path 20 (Fig.4) touches and thereby pushes out of the injection mold, in particular from the mold, or ejects. From this point on, the process repeats cyclically.
Eine weitere bevorzugte Ausführungsform sieht insbesondere im Bereich de Dosenhalses und des Dosenbodens eine sehr gute Kühlung vor, um an diesen Positionen schneller zur Verfestigung des Kunststoffes zu gelangen.A further preferred embodiment provides for a very good cooling, in particular in the area of the can neck and the bottom of the can, in order to accelerate the solidification of the plastic at these positions.
Um eine seitliche Auslenkung der Metallhülse durch große Kräfte beim Spritzvorgang zu vermeiden , sieht eine weitere bevorzugte Ausführungsform eine rillenartige Vertiefung, im Bereich 24 des Dosenmantels in der Spritzgussform vor. der Antrieb der verfahrbaren Stahlhülse erfolgt vorzugsweise in Verbindung mit der Auswerferplatte der Spritzgussform, wobei in einer weiteren bevorzugten Ausführungsform auch ein Einzelantrieb möglich ist.In order to avoid a lateral deflection of the metal sleeve by large forces during the injection process, provides a further preferred embodiment, a groove-like depression, in the area 24 of the can jacket in the injection mold before. the drive of the movable steel sleeve is preferably carried out in conjunction with the ejector of the injection mold, wherein in a further preferred embodiment, a single drive is possible.
Die Druckluftzufuhr für den Blasvorgang erfolgt beispielhaft durch die Bohrung 27 und tritt über ein vorzugsweise flächiges Ventil 28 aus dem Dosenkern aus, wobei die äußere Ventilfläche des Ventils 28 der Oberflächenkontur des Formkerns 2 angepasst ist.The compressed air supply for the blowing process is carried out by way of example through the bore 27 and exits via a preferably flat valve 28 from the can core, wherein the outer valve surface of the valve 28 of the surface contour of the mandrel 2 is adjusted.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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AT1572007A AT504952A1 (en) | 2007-01-18 | 2007-01-31 | METHOD AND MOLDING DEVICE FOR PRODUCING A PREFORM FROM PLASTIC |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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AT15732005 | 2005-09-26 | ||
AT0174705A AT502781B1 (en) | 2005-09-26 | 2005-10-25 | PLASTIC BEVERAGE CAN |
PCT/AT2006/000388 WO2007033394A2 (en) | 2005-09-26 | 2006-09-25 | Plastic beverage can |
Publications (1)
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AT504967A1 true AT504967A1 (en) | 2008-09-15 |
Family
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AT0174705A AT502781B1 (en) | 2005-09-26 | 2005-10-25 | PLASTIC BEVERAGE CAN |
AT0008807A AT504967A1 (en) | 2005-09-26 | 2007-01-18 | METHOD FOR PRODUCING A BEVERAGE CAN |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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AT0174705A AT502781B1 (en) | 2005-09-26 | 2005-10-25 | PLASTIC BEVERAGE CAN |
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AT (2) | AT502781B1 (en) |
WO (1) | WO2007033394A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015010477A1 (en) * | 2015-08-14 | 2017-02-16 | Unipress Etiketten & Schilder e.K. | Plastic beverage can |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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ITMI20090523A1 (en) * | 2009-04-01 | 2010-10-02 | Poli Box Italiana S R L | CONTAINER FOR FLUID PRODUCTS IN GENERAL, LOW DENSITY FLUIDS IN PARTICULAR. |
IT1402913B1 (en) * | 2010-12-03 | 2013-09-27 | Serilabel Di Facchinetti Srl | EXTERNAL PACKAGING FOR AT LEAST A PRE-PACKAGED PRODUCT AND METHOD OF PRODUCTION OF THE SAME. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3139131A (en) * | 1962-06-04 | 1964-06-30 | Herman R Hutchinson | Container seal structure |
DE3046726A1 (en) * | 1979-12-21 | 1981-08-27 | Metal Box Ltd., Reading, Berkshire | PLASTIC CONTAINER WITH METAL LID |
US4398648A (en) * | 1981-08-03 | 1983-08-16 | Ball Corporation | Flange structure for plastic container |
GR70176B (en) * | 1982-06-16 | 1982-08-26 | Sparti Ellas Viomihania Humon | |
US4526290A (en) * | 1983-10-19 | 1985-07-02 | Ball Corporation | Flanged container |
-
2005
- 2005-10-25 AT AT0174705A patent/AT502781B1/en active
-
2006
- 2006-09-25 WO PCT/AT2006/000388 patent/WO2007033394A2/en active Application Filing
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2007
- 2007-01-18 AT AT0008807A patent/AT504967A1/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015010477A1 (en) * | 2015-08-14 | 2017-02-16 | Unipress Etiketten & Schilder e.K. | Plastic beverage can |
Also Published As
Publication number | Publication date |
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WO2007033394A2 (en) | 2007-03-29 |
AT502781A1 (en) | 2007-05-15 |
AT502781B1 (en) | 2008-01-15 |
WO2007033394A3 (en) | 2007-09-27 |
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