EP0799119A2 - Procede et dispositif pour la fabrication de recipients - Google Patents

Procede et dispositif pour la fabrication de recipients

Info

Publication number
EP0799119A2
EP0799119A2 EP96922681A EP96922681A EP0799119A2 EP 0799119 A2 EP0799119 A2 EP 0799119A2 EP 96922681 A EP96922681 A EP 96922681A EP 96922681 A EP96922681 A EP 96922681A EP 0799119 A2 EP0799119 A2 EP 0799119A2
Authority
EP
European Patent Office
Prior art keywords
container
preform
bottle neck
indicates
transition
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Withdrawn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
EP96922681A
Other languages
German (de)
English (en)
Inventor
Wilhelm Eibner
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.)
CA Greiner and Soehne GmbH
Original Assignee
CA Greiner and Soehne 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 CA Greiner and Soehne GmbH filed Critical CA Greiner and Soehne GmbH
Publication of EP0799119A2 publication Critical patent/EP0799119A2/fr
Withdrawn legal-status Critical Current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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • 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
    • B29C49/48—Moulds
    • B29C49/4823—Moulds with incorporated heating or cooling 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
    • B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
    • 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
    • B29C49/6454—Thermal conditioning of preforms characterised by temperature differential through the preform thickness
    • 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
    • B29C49/6463—Thermal conditioning of preforms by contact heating or cooling, e.g. mandrels or cores specially adapted for heating or cooling preforms
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C2045/7343—Heating or cooling of the mould heating or cooling different mould parts at different temperatures
    • 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
    • B29C49/48—Moulds
    • B29C49/4823—Moulds with incorporated heating or cooling means
    • B29C2049/4838—Moulds with incorporated heating or cooling means for heating moulds or mould parts
    • B29C2049/4846—Moulds with incorporated heating or cooling means for heating moulds or mould parts in different areas of the mould at different temperatures, e.g. neck, shoulder or bottom
    • B29C2049/4848—Bottom
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0811—Wall thickness
    • 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
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0811—Wall thickness
    • B29C2949/0818—Wall thickness of the bottom
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • 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
    • B29C49/121—Stretching rod configuration, e.g. geometry; Stretching rod material
    • B29C49/1215—Geometry of the stretching rod, e.g. specific stretching rod end shape
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • 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

Definitions

  • the invention relates to a method and an apparatus for the production of containers and a container, in particular a reusable container, as described in the preambles of claims 1 to 3, 43 to 45 and 62 to 64.
  • a device and a method for producing hollow bodies from plastic by blow molding are already known - according to DE-Al-34 39 601 - in which a longitudinally divided shape for the hollow body neck is arranged retractably in the injection mold, which is also in the blow mold can be used.
  • the longitudinally divided shape for the hollow neck also includes that part of the mold cavity wall which extends to the shoulder of the hollow body, while the remaining part of the blow mold, which determines the shape of the hollow body below the shoulder of the hollow body, is arranged in the blow mold.
  • the present invention has for its object to provide a method and an apparatus with which containers can be produced which enable multiple use and thus a longer service life.
  • a container in particular a reusable container, is to be created which can be produced from reusable plastic material, which enables a plurality of cycles between two recycling processes and which are to be treated as well as possible in the cleaning and filling processes which take place during the cycles like the previous reusable glass containers.
  • the elasticity which can be achieved by different temperatures of the preform, can be easily adjusted in relation to the initial size in adaptation to the elongation taking place during the final shaping. In this way, excessive residual stresses or internal stresses in the individual wall cross sections can easily be prevented.
  • a procedure according to claim 4 is also advantageous since, due to the simultaneous mechanical expansion and the distribution of the remaining deformation force as equal load over a pressure medium, a uniform expansion and loading of the plastic material starting from the center is achieved and thus a uniform strength build-up without hidden stress peaks in the Container is reached.
  • This positive effect in the production of such a container is additionally positively supported by the tempering of the container in the shaping tool, since above all an uncontrolled shrinkage of the container is prevented during this tempering process and the build-up of new uncontrolled voltage peaks can thus be avoided.
  • a procedure according to claim 5 is also advantageous, since it achieves a uniform material quality and thus cavities or different expansion properties in different areas of the preform can be avoided.
  • a procedure according to claim 9 is also advantageous since the material distribution for the final shaping process can be controlled in a simple manner and the same wall thicknesses can thus be achieved for the finished container.
  • the invention also includes a device for producing such a container, as described in the preambles of claims 43 to 45.
  • the object of the present invention is achieved independently in each case by the features specified in claims 43 to 45. It is advantageous in the embodiment according to claim 43 that different temperatures can be achieved by the heating and / or cooling devices which are separate from the cavity and the core of the injection molding tool and which can be regulated independently of one another. As a result of these different temperatures, the outer layers of the preform are heated for the subsequent blowing process, so that during the final molding process, starting from the preform to the finished container, internal stresses over the thickness of the preform are avoided, since deformation occurs in the outer edge zones less resistance is opposed.
  • mold half parts arranged one behind the other in the direction of the longitudinal center axis of the injection molding tool can additionally be preset to a different temperature with respect to one another, which makes it possible to to bring the regions of the preform that are to be deformed to a higher temperature than the regions that are to be deformed less, as a result of which a higher product quality and thus a longer service life of the container can also be achieved.
  • an independent solution according to claim 45 is also advantageous, since it makes it possible to keep different areas in the direction of the longitudinal central axis at temperatures which are independent of one another, even within the shaping tool, since it is thus possible to define those zones which have a stronger or are subjected to greater deformation during the final shaping process, in order to be able to better reduce the internal stresses caused in the respective areas. This in turn creates the possibility, for example, of exposing more heavily used zones to a higher temperature, in order to ensure that the stress relief in these areas is ensured.
  • the configuration according to claim 46 ensures that no additional handling or transport devices have to be provided during the manufacturing process of the container, starting from the preform up to the removal point from the system, since the workpiece held in the upper molding from one processing station to another can be brought with one and the same handling device and this in turn can be used centered in the respective processing station.
  • the invention also includes a container, in particular a reusable container, as described in the preambles of claims 62 to 64.
  • the object of the present invention is also independently achieved independently by the features specified in claims 62 to 64. It is advantageous in the embodiment according to claim 62 that, on the one hand, by using a cross-sectional shape which is derived from an enveloping circle, good jamming capacity of the containers, such as, for example, the reusable containers, is achieved during conveyance and, on the other hand, surprisingly easily by this
  • a large cross-sectional shape adapted to the envelope circle in the corner region creates very resistant containers which withstand both the increased stresses in the pressure and vacuum filling as well as the transport and use, as a result of which a large number of cycles without damage is possible.
  • this rounding in the corner area with a relatively large Very good cleaning diameter is possible, so that such a container can also be used several times for the storage of delicate liquids, such as milk.
  • the independent solution according to claim 63 has the advantage that the circular spherical cap section achieves a uniform stress curve or transition between the very solid bottle neck and the bottle body, which is relatively thin-walled for weight and manufacturing reasons. In this way, voltage peaks can be avoided both in the case of the negative pressure and positive pressure forces that occur during filling, as well as during subsequent transport and when using the container.
  • an independent solution according to claim 64 is also advantageous, since this special ratio of the diameter of the enveloping circle to the overall height of the container achieves a relatively high stability of the container with a favorable overall height and nevertheless ensures packaging in standard containers. Furthermore, in relation to the wall thickness, this ratio requires a favorable median between the weight of the container to be used in the manufacture or the weight for transporting the same, with sufficient strength for manipulation.
  • An embodiment according to claim 65 is also advantageous, which is within narrow limits
  • a design according to claim 66 is also advantageous, which defines a transition in terms of strength that is favorable in terms of strength between the side surfaces or circular segments and the container bottom, so that, in addition to the higher stability of the container, better stability can be achieved.
  • the design according to claim 67 or 68 makes it possible for a protected area to be formed between the projecting edges projecting over the outer circumference of the reusable container, for receiving labeling instructions for the container, without these being used when the individual containers collide with one another ⁇ suffer the damage.
  • a further development according to claim 69 is also advantageous since this creates a predefined surface area which can absorb small damage, such as scratches, for example, when the individual containers collide, without the overall image of the container is affected over a large area.
  • FIG. 1 shows a schematically and simplified system for the production of containers according to the invention in side view
  • Fig. 2 shows the injection mold for producing a preform for the manufacture of the container of FIG. 1 in side view, sectioned and schematically enlarged
  • FIG. 3 shows the preform according to FIG. 2 in a top view, in section, according to the lines m-LTI in FIG. 2;
  • FIG. 4 shows the shaping tool of the system according to FIG. 1 for the production of the container in a side view, in section and schematically in an enlarged view
  • 5 shows the containers produced from the preform by the method according to the invention in a side view and on an enlarged scale;
  • FIG. 6 shows the container according to FIG. 5 in a top view
  • FIGS. 5 and 6 shows the container according to FIGS. 5 and 6 in a view from below;
  • FIG. 8 shows the container according to FIGS. 5 to 7 in a diagonal view according to arrow VILT in FIG. 6;
  • FIG. 9 shows the container according to FIGS. 5 to 8 in a side view, in section, according to the lines IX-DC in FIG. 6;
  • FIG. 10 shows another design of the shape of the cavity and the core as seen in FIG. 3 in section;
  • FIG. 11 shows a schematic, simplified illustration of a multiple arrangement of injection molding tools in a side view
  • FIG. 12 shows the injection molding tools according to FIG. 11 in plan view, in section, according to lines XII-XII in FIG. 11;
  • FIG. 13 shows a plan view in section of a partial area of a conventional injection molding tool with a core inserted into the cavity and a displacement of the two longitudinal center axes, indicated schematically by the thermal expansion, relative to one another;
  • FIG. 14 shows a shaping tool with a multiple arrangement of mold cavities for the production of containers according to the invention in a side view and a simplified, schematic illustration
  • FIG. 15 shows the shaping tool according to FIG. 14 in a top view, in section, according to the lines XV-XV in FIG. 14;
  • 16 shows a schematically illustrated heating and / or cooling device for a shaping tool or injection molding tool
  • 17 shows another side view of another container produced by the method according to the invention
  • FIGS. 17 and 18 shows the container according to FIGS. 17 and 18 in a view from below;
  • FIG. 20 shows the container according to FIGS. 17 to 19 in a diagonal view according to arrow XX in FIG. 18;
  • FIG. 21 shows the container according to FIGS. 17 to 20 in a side view, in section, according to lines XXI-XXI in FIG. 18.
  • FIG. 23 shows the preform according to FIG. 22 in section, in section, according to lines XXLII-XXIII in FIG. 24;
  • FIG. 24 shows the preform according to FIGS. 22 and 23 in a top view, in section, according to lines XXIV-XXIV in FIG. 23;
  • FIG. 25 shows the preform according to FIGS. 22 to 24 in plan view, cut, according to the
  • Fig. 26 shows a further and possibly independent embodiment of a
  • FIG. 1 shows a system 1 for the production of containers 2, in particular reusable containers, in a schematically simplified illustration.
  • the system 1 comprises an injection molding machine 3 with an extruder 4 for plasticizing raw material 5, which is stored in a receptacle 6 and is fed to the extruder 4 as required.
  • the raw material 5 can be pre-plasticized in a dryer between 80 ° C. and 140 ° C., preferably at 110 ° C., for several hours. be dried.
  • an extruder 4 with a longer screw and an additional degassing area in the area of the screw can also be used, for example.
  • the raw material 5 preferably consists of a polycarbonate, which is plasticized in the extruder 4 at a temperature between 220 ° C. and 340 ° C. and is fed to an injection mold 9 through a heating duct 7 and an injection nozzle 8.
  • the injection molding tool 9 can be designed in one part or in multiple parts and can be adjusted by means of adjusting drives (not shown in more detail) of the injection molding machine 3.
  • the injection mold 9 is formed in one piece in this embodiment and rests on a closing plate 10 of the injection molding machine 3.
  • a cavity 11, that is to say the mold cavity, is formed within the injection molding tool 9, into which the injection nozzle 8 opens, preferably from below, through which the plasticized raw material 5 is introduced.
  • the injection mold 9 is formed by an upper molded part 12 and a lower molded part 13, the upper molded part 12 forming the neck shape of the container 2 or reusable container to be produced.
  • the upper molded part 12 of the injection molding tool 9 can be formed, for example, by threaded jaws 17, in which the desired outer shape for a bottle neck 18 of the container 2 or reusable container is already molded.
  • the threaded jaws 17 designed as the upper molded part 12 also serve as a handling device 19 which, by means of a wide variety of guide and drive elements in their movement can be guided or controlled. The relative movement of the handling device 19 or the core 15 in relation to the individual work stations can take place according to the double arrows entered.
  • Both the core 15 and the cavity 11 are, for the sake of easier demolding, starting from the upper molded part 12 in the direction of the closing plate 10, continuously tapering, that is to say slightly conical. This makes it possible to form the lower molded part 12 of the injection molding tool 9 in one piece. However, it is of course possible to use any other design of the injection molding tool 9, as are known from the prior art.
  • a temperature difference between core 15 and cavity 11 is between 10 ° C. and 40 ° C., preferably between 20 ° C. and 30 ° C.
  • the preform 14 is now produced in such a way that the upper molded part 12 is correspondingly placed on the lower molded part 13, as a result of which the entire injection mold 9 is formed.
  • the core 15 is inserted concentrically into the cavity 11, as a result of which the three-dimensional shape of the preform 14 to be produced is formed in the injection mold 9.
  • Both the core 15 and the lower molded part 13 of the injection molding tool 9 are brought to the desired temperature by the feed lines 20 and 22 and the discharge lines 21 and 23, in which the raw material 5 can be sprayed properly.
  • the plasticized raw material 5 is introduced into the cavity 11 or the mold cavity, which is formed between the cavity 11 and the core 15, via the heating channel 7 and the injection nozzle 8.
  • the upper molded part 12, which is also the handling device 19 for the Preform 14 represents, removed after removal of the core 15 from the injection molding tool 9 and placed in a shaping tool 24 arranged next to the injection molding tool 9, without the upper molding 12 being opened from its closed position.
  • a schematically arranged protective cover 25 is arranged in the area of the upper molded part 12, extending down over the preform 14 and preventing cold ambient air from entering the heated and still viscous preform 14 during the transport time from the injection molding tool 9 to the forming tool 24 prevented.
  • both the injection molding tool 9 and the shaping tool 24 within a cabin (not shown) in which there are uniform and presettable environmental conditions, such as temperature, pressure, air humidity, air quality, etc., which are flawless Ensuring product quality or building an air curtain with selected conditions with regard to temperature and air content from air and / or noble gas.
  • the shaping tool 24 can be formed by a stretching tool 26 as well as a blowing tool 27 or a combination of the two.
  • the shaping tool 24 is designed as a two-part shape with its two mold halves 28 and 29, into which the outer shapes of the container 2 or reusable container to be produced are molded and thus form a mold cavity 30 for the final shaping.
  • the mold parting plane is diagonal, i.e. be arranged in the corner areas of the container 2 or reusable container.
  • the two mold halves 28 and 29 are moved apart and opened along guide devices 32 by means of drive devices 31 (not shown and described in any more detail) and the container 2 or Reusable containers are removed from the shaping tool 24 by means of the upper molded part 12, which still comprises the bottle neck 18, and are placed with their container bottom 33 on a transport device 34 and transported from there to the production area.
  • the finished container 2 or reusable containers can be conveyed into the area of a heat source 35 which faces the container bottom 33 and over a certain period of time, for example over 30 seconds. to 90 see., preferably 60 see., heated to a temperature between 100 ° C. and 150 ° C., preferably 130 ° C., or kept at this temperature.
  • This heat source 35 can be formed, for example, by an infrared device, which generates the corresponding temperature with an infrared lamp and effects a so-called infrared tempering of the container bottom 33. This has the effect of removing stresses that occur during the manufacturing process.
  • This tempering process of the bottom area of the container 2 or reusable container is necessary precisely in this section, since, due to the manufacturing process, a combined stretching and / or blowing of the preform 14 to the final shape of the container 2 or
  • the transport device 34 brings the finished containers 2 or reusable containers into the area of a storage container 36, which, however, also e.g. can be formed by a pallet or the like. From there, they are moved from the area of Appendix 1 to an interim storage facility.
  • the container 2 or reusable container has the bottle neck 18, which forms a filling opening 37 for the media to be accommodated therein, the outer shape of the bottle neck 18 already in its final spatial shape during the injection process of the preform 14 upper molding 12 is set. This ensures that an exact spatial shape for the connection of locking devices directions or sealing devices is given.
  • a transition region 38 extending in the direction of the container bottom 33 is provided on the bottle neck 18.
  • the cross section of the container 2 or reusable container adjoining the transition region 38 is designed as an enveloping circle 39 with four flattened side surfaces 40.
  • the container 2 or reusable container has an overall height 41, which consists of a length 42 of the bottle neck 18, a transition length 43 of the transition region 38, a width 44 of the entire cross section of the container 2 or reusable container and all the way round and over the Side surfaces 40 or the abutting edges 45 protruding from the enveloping circle 39, a height 46 of a bottom region 47 between the lower abutting edge 45 and the container bottom 33 and a length 48 of the side surfaces 40, which extends between the two abutting edges 45.
  • the injection mold 9 according to FIG. 1 is shown on a larger scale, the same reference numerals being used for the same parts.
  • the injection molding tool 9 is formed from the upper molded part 12 and the lower molded part 13, the upper molded part 13 forming the neck shape, ie the bottle neck 18, for the container 2 or reusable container and being designed as a two-part mold for demolding.
  • this configuration of the preform 14 it is possible with this configuration of the preform 14 to form the lower molded part 13 as a one-piece mold, since the molded preform 14 can be easily removed from the mold due to the shape of the cavity 11, as is known from the prior art nik is generally known.
  • the lower molded part 13 is held on the closing plate 10, the plasticized raw material 5 being fed into the cavity 11 from below through the injection nozzle 8.
  • the height-adjustable core 15 is inserted into the injection mold 9 through an opening 49 in the upper molded part 12.
  • both the feed line 20 and the discharge line 21 are arranged in the core 15, which allow heat to be supplied within the core 15 in the region of the preform 14 to be produced.
  • the lower mold part 13 is formed from an inner and outer mold half 50 or 51, for example the inner mold half 50 being formed from two mold half parts 52, 53 arranged one above the other and between the two mold half parts e.g. an insulating layer 54 can be arranged in order to preheat or cool the two mold half parts 52, 53 to different temperatures.
  • This supply of tempered or cooled media in turn takes place via feed lines 55 and 56 and discharge lines 57 and 58, which are arranged in the outer mold half 51.
  • the distribution of the individual media in the area of the mold half parts 52 or 53 can e.g.
  • the outer mold half 51 receiving the inner mold half 50 or its mold half parts 52, 53 on its lower or upper side 59 or 60 on cooled plates 61 or 62.
  • the lower plate 61 can be formed by the closing plate 10.
  • the injection molding tool 9 consists of a plurality of cavities 11 arranged next to one another for the simultaneous production of a plurality of preforms 14, it has proven to be advantageous to separate each of the individual cavities 11 in a separate and spaced-apart manner Form injection molding tool 9, which results in an improvement in the thermal expansion, as is described in more detail in one of the following figures. Due to the cooled plates 61 and 62 and the separate multiple arrangement of the individual cavities 11, as previously described, the thermal expansion is improved and the position of the individual cores 15 is stabilized.
  • the preform 14 is manufactured in such a way that the upper molded part 12, which e.g. is formed by the threaded jaws 17, is placed on the lower mold part 13, whereby the outer spatial shape of the preform 14 is fixed.
  • the core 15 is then inserted through the opening 49 in the upper molded part 12, whereby e.g. centering and vertical alignment are carried out through the opening 49 and a projection 64 of the upper molded part 12 cooperating with a collar 63 of the core 15.
  • Both the opening 49 and the corresponding counterpart of the core 15 can be designed to taper conically in the direction of the bottle neck 18.
  • This precise insertion of the core 15 into the injection molding tool 9 thus also defines the internal three-dimensional shape of the preform 14, thereby forming the mold cavity in which the plasticized raw material 5 is now introduced into the injection molding machine 3 via the injection nozzle 8 can be. Furthermore, it is shown in the area of the injection nozzle 8 that the preform 14 has a sprue 65 on its underside, which is deformed accordingly during the production of the final shape. The preform 14 has in its conical area the wall thickness 16, which, due to the subsequent final shaping process, is greater than a mean thickness 66 of the bottle neck 18, which already has its final shape.
  • the cavity 11 has a circular cross section with respect to a center 67, through which a longitudinal central axis 68 - FIG. 2 - of both the core 15 and the cavity 11 runs with a diameter of 69. Due to the bevel of the cavity 11, the diameter 69 decreases continuously starting from the bottle neck 18 in the direction of the sprue 65.
  • the core 15 of the injection molding tool 9 is arranged concentrically to the cavity 11, that is to say in its common center 67.
  • the core 15, preferably evenly distributed over its circumference has four flats 70 which are arranged offset from one another by an angle 71 of preferably 90 °.
  • the respective flattening 70 is 72 in relation to a circular cross section drawn in dash-dotted lines, which, depending on the desired wall thickness of the container 2 or reusable container, is preferably between 0.1 mm and 1 mm, preferably 0.3 mm , is.
  • These flats 70 cause one Material accumulation of the preform 14 in relation to areas 73 arranged between these flattenings 70, as a result of which the wall thickness 16, starting from a minimum value in the area 73, steadily increases to a maximum value towards the flattening 70 and in turn steadily decreases towards the next area 73.
  • the individual flats 70 are each assigned to the side surfaces 40 and the areas 73 to the edge areas of the container 2 or reusable container formed by the enveloping circle 39, as has been shown disproportionately in a broken line.
  • the preform 14 has an initial length 74, which is preferably smaller than the finished overall height 41 of the container 2 or reusable container.
  • the length ratio of the preform 14 or preform to the finished container 2 or reusable container is between 1: 1.4 to 1: 1.8, preferably between 1: 1.5 and 1: 1.7.
  • the shaping tool 24 is shown on a larger scale, the same reference numerals as in FIGS. 1 to 3 having been used for the same parts.
  • the upper molded part 12 forms the handling device 19 for the preform 14, which is formed, for example, by the threaded jaws 17.
  • the preform 14 is moved from the area of the injection molding tool 9 into the area of the molding tool 24 by means of the handling device 19 and inserted therein centrally to a longitudinal central axis 75.
  • the shaping tool 24 is formed from the stretching and / or blowing tool 26 or 27, the two mold halves 28 and 29 forming a blow mold 76 which, owing to the outer shape or contour of the container 2 or reusable container to be produced, divides is executed.
  • the blow mold 76 and its mold halves 28, 29 are formed from holding plates 77 and 78, on which blow mold shells 79, 80 are held and which, in their closed state, form the mold cavity 30 for the final shaping of the container 2 or reusable container .
  • the blow mold shells 79, 80 thus also form the side walls of the blow mold or of the container 2 or reusable container.
  • the blow mold 76 also has a height-adjustable blow base 81, which can be adjusted relative to the blow mold 76 in the direction of the longitudinal central axis 75 of the blow mold 76 according to a double arrow 82.
  • This blowing base 81 is assigned to the base region 47 of the container 2 or reusable container and can additionally be set to a desired temperature by means of a supply line 83 or a discharge line 84 with a temperature-controlled medium.
  • the threaded jaws 17 are inserted into the opening 49 from above Blowing mandrel 85 inserted therein, a collar 86 of the blowing mandrel 85 being supported on the projection 64 of the threaded jaws 17.
  • both the opening 49 in the threaded jaws 17 and an associated contact surface 87 of the blow mandrel 85 are conical, the cone being continuously tapering in the direction of the bottle neck 18.
  • This conical design can of course also be used for the core 15 shown in FIG. 2, since this is also to be centered in the opening 49.
  • blow mandrel 85 has an area on its area facing the bottle neck 18
  • Blow pin attachment 88 which forms the final shape of the fill opening 37 for the bottle neck 18 on the preform 14.
  • a guide 89 for a stretching die 90 is also held, in which the stretching die 90 is mounted so as to be adjustable in the direction of the longitudinal central axis 75 by means of adjusting drives (not shown), according to a double arrow 91.
  • the stretching die 90 further has a head 92, which is designed such that an outer diameter 93 of the head 92 is in any case smaller than an innermost inner diameter 94 of the preform 14 in the region of the sprue 65 This ensures that the stretching die 90 can be moved with its head 92 inside the preform 14 to its bottom wall 95 without an outer surface of the head 92 touching the preform 14 on its inner surface and damaging it Head 92, which can also be referred to as a tip, is preferably formed from aluminum due to the high processing temperature of the plastic material.
  • feed openings 96 are arranged in the blowing mandrel 85, through which a pressure medium, such as air in the form of blowing air, inert gas, water, liquid, etc., can be introduced within the preform 14.
  • a pressure medium such as air in the form of blowing air, inert gas, water, liquid, etc.
  • This blowing air has a temperature of approximately 20 ° C., which usually corresponds to the ambient temperature and can be both pre-dried and cleaned or sterilized. This prevents soiling or the penetration or diffusion of dirt into the still doughy plastic of the preform 14, so that the container 2 or reusable container is suitable for holding food.
  • ambient air, rare gas, a mixture of air and rare gas, etc. can be used as blowing air.
  • the final shaping process from the preform 14 for the container 2 or reusable container is carried out by a preferably combined stretching and / or blowing process, in that either the stretching die 90 is first moved in the direction of the blowing base 81, the sprue 65 being deformed accordingly and the controlled height movement from the stretching die 90 to the blowing base 81 defines the finished wall thickness of the container 2 or reusable container.
  • the blowing base 81 is in its lowest or lowest position, which is located below the container base 33, during the stretching process, that is to say the movement of the stretching die 90 in the direction of the blowing base 81.
  • the blowing air in the form of compressed air with a pressure between 4 bar and 8 bar, preferably 6.5 bar, is introduced inside the preform 14 and thus the material of the preform 14 Bring plant to the mold cavity 30.
  • the blowing base 81 is moved in the direction of the bottle neck 18, as a result of which the container base 33 is brought into its final shape.
  • the necessary stroke of the blown base depends on the design of the bottom area 47 of the container 2 or reusable container and can be between 10 mm and 20 mm, preferably between 14 mm and 16 mm.
  • the blow bottom 81 protrudes over a fraction of the height of the blow mold shells 79, 80 in the direction of the upper molded part 12, thereby forming a depression in the bottom area 47 in the direction of the bottle neck 18.
  • the stretching die 90 can already be lifted off the bottom region 47 of the container 2 or reusable container and at the same time the blow mold 81 can be heated to a temperature between 70 ° C. and 150 ° C., preferably higher, for a tempering process already provided within the blow mold 76 1 () 0 ° C or 120 ° C, can be heated using preheated media.
  • the manufacturing stresses built up in the strongly deformed bottom region 47 of the container 2 or reusable container are reduced within the material of the container 2 or reusable container, as a result of which the subsequent annealing described above is eliminated and an additional work process can thus be avoided.
  • the bottom area 47 or the blow molding shells 79, 80 are cooled accordingly in order to achieve a solidification of the container 2 or reusable container, whereupon the finished container 2 or reusable container can be removed from the shaping tool 24.
  • This entire final shaping process i.e. stretching and blowing, extends over a period of between 4 see. and 15 lake, preferably 7 lake, in which the shaping tool 24 remains closed.
  • the tool heater acts on the container 2 or reusable container to be produced over this entire period.
  • the blown air for the final shaping process acts on the stretched preform 14 between 3 sea and 5 sea, preferably 4 sea.
  • blow mold shells 79 and 80 It has proven advantageous to preheat the blow mold shells 79 and 80 to a temperature between 60 ° C. and 150 ° C., preferably between 90 ° C. and 120 ° C.
  • the temperature in each section should be approximately the same over the entire circumference of the container 2 or reusable container or have a lower tolerance of ⁇ 4 ° C.
  • the container 2 or reusable container has the bottle neck 18 with its filling opening 37, which extends over the length 42.
  • the transition region 38 adjoins the bottle neck 18 with its transition length 43, which merges with the length 48 in the side surfaces 40 or circular segments 103 formed by the enveloping circle 39.
  • the container base 33 which is recessed in the direction of the bottle neck 18, is arranged in the base region 47, the base region 47 having the height 46 up to the lower abutting edge 45.
  • the upper joint edge 45 is arranged between the transition region 38 and the side surfaces 40 or the circular segments 103, both joint edges 45 having the width 44. That area of the container 2 or reusable container which extends from the bottle neck 18 to the container bottom 33 can also be referred to as a container or bottle body.
  • the two abutting edges 45 protrude over the entire cross-section of the container 2 or reusable container with their outer surfaces 104 by a dimension 105 which is between 0.1 mm and 1.5 mm, preferably between 0.2 mm and 0.7 mm, for example 0.25 mm or 0.5 mm, is outward beyond the side surfaces 40 or circular segments 103.
  • a dimension 105 which is between 0.1 mm and 1.5 mm, preferably between 0.2 mm and 0.7 mm, for example 0.25 mm or 0.5 mm, is outward beyond the side surfaces 40 or circular segments 103.
  • an overlap is provided on both sides of the abutting edges 45 gear radius 106 arranged.
  • Bump edges 45 avoid a notch effect in these areas, whereby the risk of breakage is significantly reduced. In addition, this also creates an easy-to-clean area in which dirt cannot be deposited so easily. Due to the all-round protrusion of the two butt edges 45 by the dimension 105, a protected area is formed between the two butt edges 45 over the length 48 for receiving and attaching labels or labeling instructions for the contents of the container 2 or reusable container.
  • the two abutting edges 45 with a surface roughness of between 3 ⁇ m and 20 ⁇ m, which is indicated schematically in some areas.
  • This surface roughness primarily serves to make the surface damage that occurs when the individual containers 2 or reusable containers collide with one another immediately visible to the user, since the surface damage usually occurs in the form of small scratches or surface clouding and thus does not are immediately recognizable.
  • a base radius 107 between the side surfaces 40 and the container base 33 is preferably equal to or smaller than a base radius 108 between the circular segments 103 and the container base 33
  • the base radius 107 can be between 4 mm and 11 mm and the base radius 108 between 10 mm and 16 mm.
  • the detailed design of the container bottom 33 can also be better seen. Due to the cut in FIG. 9, the container 2 or reusable container with the side surface 40 is shown in the left half and the circle 2 or reusable container with the circle segment 103 in the right half.
  • the floor radii 107 and 108, which are preferably of different sizes, and the standing surface 109 which has just been executed can be seen better.
  • the container base 33 In the center of the container 2 or reusable container, through which its central longitudinal Axis 110 runs, the container base 33 has a bottom segment 111 which is recessed in relation to the base 109 in the direction of the bottle neck 18 and which is aligned parallel and also flat to the base 109.
  • the shaped sprue 65 of the preform 14 can be seen in the region of the central longitudinal axis 110.
  • the base segment 111 is designed as a flat surface and has an enveloping circle 113 provided with flats 112 in its plan shape, the flats 112 being assigned to the side segments 40 and enveloping circle parts 114 of the enveloping circle 113 to the circular segments 103 in their position.
  • This enveloping circle 113 can have a diameter between 10 mm and 30 mm.
  • the transition between the floor segment 111, which is recessed in relation to the standing surface 109, and the standing surface 109 takes place through part of a conical shell 115 which, starting from the container bottom 33, is tapered in the direction of the bottle neck 18.
  • This conical shell 115 is in turn provided with flattened areas, whereby in each case the flattened portion 112 of the base segment 111 is assigned an intermediate surface 116 and in each case the envelope circle part 114 is assigned a conical shell part 117. Due to the conical shape of the container base towards the base segment 111, this is arranged recessed by a depth 118 in relation to the standing surface 109 in the direction of the bottle neck 18.
  • This special design of the bottom region 47 or the container bottom 33 is therefore chosen such that, on the one hand, a standing surface 109 is achieved which is distant from the central longitudinal axis 110 and, on the other hand, a structurally favorable arrangement of the individual surface parts of the container bottom 33 is achieved.
  • FIG. 6 shows the container 2 or reusable container in a view from above, in which on the one hand the cross-sectional shape and on the other hand the design of the transition area ches 38 of the container 2 or reusable container can be seen.
  • the container 2 or reusable container has the cross section flattened by the enveloping circle 39 and with the side surfaces 40, the circular segments 103 of the schematically indicated enveloping circle 39 still being present between the side surfaces 40.
  • the enveloping circle 39 has a diameter 119 which is greater than a distance 120 between two mutually opposite side surfaces 40.
  • the distance 120 between the respectively assigned and opposite side surfaces 40 is chosen to be the same in this exemplary embodiment and is concentric to the central longitudinal axis 110 arranged
  • the individual circular segments 103 between the side surfaces 40 simultaneously form corner regions 121 of the container 2 or reusable container, which are designed in such a way that the ability of the individual containers 2 or reusable containers to juggle each other and thereby reduce the space required for the washing process and the feeding the filling lines is reached. This makes it possible to use this type of container 2 or reusable container instead of glass bottles without major retrofitting of the filling and washing systems.
  • the transition region 38 between the bottle neck 18 and the upper abutting edge 45 has a further special design.
  • a neck radius 122 which runs all around and has a uniform radius of curvature follows the bottle neck 18 in the direction of the upper joint edge 45.
  • the neck radius 122 forms the spatial shape of part of a circular ring or section of an outwardly curved spherical cap as the transition from the bottle neck 18 to the transition region 38.
  • each side surface 40 of the container 2 or reusable container is assigned a parallel and continuously curved transition surface 123, with which the cross-section of the container 2 or reusable container is tapered, starting from the upper joint edge 45 towards the bottle neck 18, can be achieved.
  • each corner region 121 is assigned a corner region surface 124 which is formed both horizontally and vertically curved in the direction of the neck radius 122 and between the transition surfaces 123. Both the transition surface 123 and the corner region surface 124 are curved toward the outside.
  • a high volume can be filled into the container 2 or reusable container, as a result of which the overall height 41 can be made smaller than containers or bottles which are slimmer in these areas and in addition to shifting the welding point in the direction of the floor area, a higher standing capacity of the container 2 or reusable container can be achieved.
  • a diameter of the enveloping circle 39 is between 30% and 80%, preferably between 35% and 70%, the overall height 41 of the container 2 or reusable container.
  • a further transition radius 106 is arranged after the neck radius 122. This also avoids a sharp-edged formation in the area of the surface of the container 2 or reusable container, whereby a predefined predetermined breaking point is avoided.
  • the bottle neck 18, starting from an upper edge 125, has a stepped design on its outer surface, which interacts in a form-fitting manner with a closure cap (not shown).
  • the bottle neck 18 already has its final three-dimensional shape after the injection process, the filling opening 37 being fixed by means of the blow pin attachment 88 only during the stretching and / or blowing process.
  • a mold separation takes place between the upper molded part 12 and the lower molded part 13 or the blow mold 76 in the lower region of the bottle neck 18, that is to say that which is closer to the neck radius 122.
  • the bottle neck 18 furthermore, at a distance 126, starting from the upper edge 125, has a flange-shaped and all-round collar 127 which projects outwards beyond the average thickness 66 and which is measured with a thickness 128 in the direction of the central longitudinal axis 110. is trained.
  • This collar 127 has an outer diameter 129 which corresponds approximately to a mean inner diameter 130 of the filler opening 37 plus approximately four times the mean thickness 66 of the bottle neck 18.
  • the outer diameter 129 is, however, at least chosen so large that it is at least equal to or larger than a maximum outer diameter of the closure cap. This ensures that the closure cap cannot be unintentionally removed or removed from the bottle neck 18, since it also extends starting from the top edge 125 to an upper side 131 of the collar 127 facing it.
  • container walls 132 and 133 Due to the final shaping process, namely a preferably combined stretching and / or blowing process from the preform 14, container walls 132 and 133 now have approximately the same wall thickness 134 and 135 as seen across the cross section of the container 2 or reusable container.
  • the container wall 132 with its wall thickness 134 is assigned to the side surfaces 40 and transition surfaces 123 and the container wall 133 with its wall thickness 135 is assigned to the circular segments 103 or corner area surfaces 124.
  • These have approximately the same wall thickness due to the final shaping process, it is also of approximately the same design in the region of the abutting edges 45 and the bottom region 47 and is between 0.50 mm and 2.0 mm.
  • a wall thickness of at least 0.8 mm should not be undercut. This is additionally improved by the flattenings 70 of the core 15 already described in FIG. 3.
  • the wall thickness can advantageously also be between 0.4 mm and 2.5 mm, preferably between 0.8 mm and 1.2 mm.
  • the container 2 or reusable container with regard to its spatial shape and the radii arranged between the flat surfaces in connection with the wall thickness requires for the filling process of a medium to be accommodated in the container 2 or reusable container that the medium also occurs Withstands loads without damage, especially unbreakable.
  • the container 2 or reusable container to be filled is first pressed against a filling nozzle in the area of the bottle neck 18, as a result of which this is subjected to a pressure load between the container bottom 33 and the bottle neck 18 and the side surfaces 40 or circular segments 103 usually deform outwards according to this load.
  • FIG. 10 shows a different design option for the injection molding tool 9, in particular the core 15 and the cavity 11, the same reference numerals as in FIGS. 2 and 3 being used for the same parts.
  • the longitudinal central axis 68 of the injection molding tool 9 runs through the center 67 of the cavity 11, to which the core 15 is also inserted coaxially into the injection molding tool 9.
  • this core in turn has both the feed line 20 and the drain line 21 for temperature-controlled or cooled media in order to keep the core 15 at the desired temperature.
  • the inner mold half 50 is shown here with its mold half part 52.
  • the outer contour of the finished container 2 or reusable represented schematically and disproportionately in order to better represent the special design of the cross-sectional shape of the core 15 and the cavity 11.
  • the container 2 or reusable container in turn has a circular cross section with the enveloping circle 39, which is flattened evenly distributed over the circumference, as a result of which the side surfaces 40 form. Between the individual side surfaces 40, in turn, the circular segments 103 of the enveloping circle 39 form, which thus represent the corner region 121 of the container 2 or reusable container.
  • the mutually facing side surfaces 40 are arranged at a distance 120 from one another, which results in the approximately square cross section of the container 2 or reusable container.
  • Both the core 15 and the cavity 11 have a square cross section corresponding to the side surfaces 40, a side length 136 of the cavity 11 roughly corresponding to between 30% and 50%, preferably 40%, of the distance 120 between the side surfaces 40
  • the outer contour of the preform 14 delimited by the cavity 11 is provided with a rounding 137 in the areas assigned to the corner regions 121 of the container 2 or reusable container, a radius of the rounding 137 being between 10 mm and 25 mm.
  • the core 15 has an outer spatial shape that is reduced and correspondingly reduced in relation to the cross-sectional shape of the cavity 11 in the direction of the longitudinal central axis 68 by the wall thickness 16 of the preform 14, which in turn clearly defines the mold cavity for producing the preform 14.
  • the latter has a cross section starting from the bottle neck 18 and continuously tapering towards the sprue 65, as is generally known from the prior art.
  • the core 15 can, for example, again provide on its shaped surfaces 139 facing the side surfaces 40 of the container 2 or reusable container with only a schematically indicated flattening 70 be so as to achieve a material accumulation in the middle of the shaped surfaces 139 for the formation of the side surfaces 40.
  • the extent 72 of the flattening 70 with respect to the flat surface 139 just formed can again be between 0.1 mm and 1 mm, preferably 0.3 mm, and continuously decreasing in the direction of the roundings 137, starting from the center of the surface 139 be trained.
  • a multiple tool 140 for the simultaneous production of several preforms 14 is shown, which in this embodiment is formed from three individual injection molding tools 9. Since only the basic arrangement of the individual injection molding tools 9 is to be shown here with respect to one another, the detailed description and illustration of individual components or component groups has been dispensed with, since this is an embodiment which has already been described in detail in the preceding ones Figures have been described and thus the same reference numerals are used for the same parts.
  • the individual injection molding tools 9 of the multiple tool 140 are arranged one after the other in the direction of an axis 141 at a preferably equal distance 142, following the extruder 4 of the injection molding machine 3.
  • the distance 142 is chosen so large that it corresponds to at least a length 143 of an injection molding tool 9 plus an intermediate space 144.
  • This space 144 is chosen so large that the individual injection molds 9 can expand in the direction of the axis 141, according to a double arrow 145, due to the heat load, without the distance 142 between the individual longitudinal central axes 68 of the individual cavities 11 of the injection molds 9 changing .
  • This thermal expansion naturally also takes place transversely to the axis 141, but has no influence on the distances 142.
  • the cores 15 held individually in the handling device 19 have a preferably uniform distance 147 with respect to their longitudinal central axis 146 in the direction of the axis 141, which is exactly the distance 142 between the individual longitudinal central axes 68 of the cavities 11 in the injection molding tools 9 corresponds.
  • This uniform wall thickness 16 could be achieved in a single injection molding tool 9 with a plurality of cavities 11 arranged therein due to the thermal expansion of the injection molding tool. not achieve 9 in the direction of axis 141. Due to the thermal expansion in a complete tool with a plurality of cavities 11 arranged one behind the other, the distances 142 between the individual cavities 11 increase, starting from the central cavity 11 in the direction of the axis 141.
  • the individual distances 147 between the longitudinal central axes 146 of the individual cores 15 remain unchanged in the handling device 19 in the direction of the axis 141, as a result of which the longitudinal central axes 68 of the two cavities 11 arranged adjacent to the central cavity 11 shift with respect to the longitudinal central axes 146 of the cores 15 assigned to them and thus the respective core 15 no longer coaxial with the cavity 11 is arranged.
  • This effect occurs in particular in the two outer cavities 11, as a result of which the wall thickness 16 of the preform 14 is no longer formed to be uniformly thick as viewed across the cross section.
  • FIG. 13 This enlargement of the distance 142 to the distance 147 is shown schematically and enlarged in FIG. 13, in which, starting from the central cavity 11, in the case of a simple tool with a plurality of cavities 11 arranged therein, the wall thickness 16 of the preform
  • This dislocation 148 is avoided according to the multiple tool 140 shown in FIGS. 11 and 12 by the previously described expansion possibility of the individual injection molding tools 9, independently of one another, since these are independent of one another on the common closing plate 10 are supported.
  • this offset 148 can also be achieved, for example, in the case of multi-part tools 140, which are made in one piece, by adjusting the distances 147 between the individual cores
  • the 15 or upper molded parts 12 can be compensated for by a mounting of these components, preferably floating in the horizontal direction, in the handling device 19.
  • the corresponding alignment or centering of the longitudinal central axes 146 to the longitudinal central axes 68 of the cavities 11 can be achieved by a corresponding conical configuration between the upper and lower molded parts 12, 13 or the upper molded part 12 and the core 15 or the Blow mandrel 85 take place.
  • the feed of the raw material 5 from the extruder 4 takes place via the schematically illustrated common injection nozzle 8 to each of the individual injection molding tools 9 of the multiple tool 140 in order to form the preforms 14 in the individual closed cavities 11 through the upper and lower molded parts 12, 13 to be able to.
  • a correspondingly tempered medium is fed to the first injection molding tool 9 via the feed line 22 and from there via lines 149 to the second or third injection molding tool 9 and from there the derivation 23 is forwarded to conveying devices, collecting containers, heating and / or cooling devices, not shown.
  • each of the individual injection molding tools 9 with its own temperature control circuit, with a separate derivative 23 being indicated schematically in dashed lines in the first injection molding tool 9. This allows, for example, an even better temperature control or a better temperature profile to be achieved in each of the individual injection molding tools 9.
  • the individual preforms 14 are removed from the multiple tool 140 after the injection molding process by means of the handling device 19 or the individual threaded jaws 17 from the lower mold parts 13 and are brought into the shaping tool 24 indicated schematically in FIGS. 14 and 15.
  • This shaping tool 24 is only a multiple arrangement of a plurality of mold cavities 30 in the two mold halves 28 and 29, as has already been described in detail in FIG. 4. Therefore, the same reference numerals are used for the same parts as in the previous figures.
  • the individual distances 147 between the longitudinal central axes 146 or cores 15 correspond exactly to a distance 150 between the individual longitudinal central axes 75 of the mold cavities 30 in the direction of an axis 151 of the shaping tool 24.
  • a corresponding temperature control of the shaping tool 24, which is designed as a stretching and / or blowing tool 26, 27, can also take place, as already described in detail in the previous figures.
  • This number or multiple arrangement of cavities 11 in the multiple tool 140 or the number of mold cavities 30 in the molding tool 24 can be chosen freely depending on the design of the container 2 or reusable container to be produced, the number depending on the selected shape of the Container 2 or reusable container and can be determined by the machine size.
  • FIG 16 shows a number of separate heating and / or cooling devices 152, schematically indicated, which can be regulated or controlled independently of one another, the same reference numerals being used for the same parts as in the previous FIGS. 1 to 15.
  • These heating and / or cooling devices 152 are assigned to a shaping tool 24, which is formed from the two mold halves 28 and 29 shown open and the blowing base 81.
  • the injection molding tool 9 can also be used with these heating tools.
  • / or cooling devices 152 are supplied in sections with appropriately tempered media 153.
  • the shape of the shaping tool 24 is subdivided into sections 97 to 100 over its height profile, these sections each being assigned to certain regions of the mold cavity 30 for the production of the container 2 or reusable container.
  • Each of the individual sections 97 to 100 is supplied with the appropriately temperature-controlled medium 153 via its own supply lines 101 or lines 102.
  • the respective individual sections 97 to 100 in each of the individual mold halves 28 and 29 are in flow communication with one another.
  • each of the individual sections 97 to 100 or also the blowing base 81 is assigned its own conveying device 154, such as a feed pump, with an adjusting member 155 assigned to this conveying device 154 for setting the desired delivery pressure.
  • a heat exchanger 156 is arranged in each of the feed lines 101 with an adjusting member 157 associated therewith.
  • the setting members 157 a different setting for the temperature of the medium 153 supplied via the feed lines 101 to the different sections 97 to 100 is shown schematically for each of the individual heat exchangers 156.
  • the medium 153 is stored here in a schematically indicated common collecting container 158, from which the individual conveying devices 154 feed the medium 153 via the heat exchangers 156 to the individual sections 97 to 100 or to the blowing base 81.
  • the return of the medium 153 into the collection container 158 takes place here via a schematically illustrated common discharge line 102.
  • Each of the individual sections 97 to 100 or the blowing base 81 can thus be supplied with different pressures in the medium 153 or also different temperatures.
  • the core 15 can of course also be appropriately supplied with a temperature-controlled medium 153 when using the heating and / or cooling devices 152 for the injection molding tool 9.
  • 17 to 21 is another with the inventive method from the preform ling 14 produced container 159 or reusable container is shown on a larger scale. It should be mentioned that the selected outer shape or contour is reproduced only by way of example and it is of course possible to freely choose any other outer shape or contour. The same reference numerals are used for the same parts as in the preceding FIGS. 5 to 9.
  • the container 159 or reusable container has the bottle neck 18 with its fill opening 37, which extends over the length 42.
  • the transition region 38 adjoins the bottle neck 18 with its transition length 43, which merges with the length 48 into the side surfaces 40 or circular segments 103 formed by the enveloping circle 39.
  • the container bottom 33 which is recessed in the direction of the bottle neck 18, is arranged in the base region 47, the base region 47 having the height 46 up to the lower abutting edge 45.
  • the upper joint edge 45 is arranged between the transition region 38 and the side surfaces 40 or the circular segments 103, the two joint edges 45 having the width 44.
  • the two abutting edges 45 in turn protrude outward over the entire cross-section of the container 159 or reusable container with their outer surfaces 104 by the extent 105 over the side surfaces 40 or circular segments 103.
  • the transition radius 106 is in each case on both sides of the bumper edges 45 arranged.
  • a notch effect in these areas is avoided, particularly when there are lateral forces on the abutting edges 45, as a result of which the risk of breakage is significantly reduced.
  • this also creates an easy-to-clean area in which dirt cannot accumulate so easily. Due to the all-round protrusion of the two butt edges 45 by the dimension 105, a protected area is formed between the two butt edges 45 over the length 48 for receiving and attaching labels or labeling instructions for the contents of the container 159 or reusable container.
  • the two abutting edges 45 with a surface roughness of between 3 ⁇ m and 20 ⁇ m, which is indicated schematically in some areas.
  • This surface roughness primarily serves to make the surface damage which occurs when the individual containers 159 or reusable containers collide with one another immediately visible to the user, since the surface damage usually occurs in the form of small scratches or surface clouding and so on are not immediately recognizable.
  • the base radius 107 between the side surfaces 40 and the container base 33 is preferably equal to or smaller than the base radius 108 between the circular segments 103 and the container base 33
  • the bottom radius 107 can be between 3 mm and 11 mm and the bottom radius 108 between 5 mm and 16 mm.
  • base radii 107 and 108 can also be seen from FIG. 19, with the all-round, flat standing surface 109 being formed on the container base 33 following the base radii 107 and 108. Due to the preferably different sizes of the base radii 107 and 108, it is possible to form the standing surface 109 near the side surfaces 40, as a result of which the stability of the container 159 or reusable container can be increased enormously. However, the bottom radii 107, 108 mentioned in FIGS. 5 to 9 can also be used here.
  • the container bottom 33 can be seen better. Due to the cut in FIG. 21, the container 159 or reusable container with the side surface 40 is shown in the left half and the container 159 or reusable container with the circular segment 103 in the right half. The bottom radii 107 or 108 and the stand area 109 just executed.
  • the container base 33 In the center of the container 159 or reusable container, through which its central longitudinal axis 110 also runs, the container base 33 has the bottom segment 1111, which is recessed in relation to the base surface 109 in the direction of the bottle neck 18 and which is parallel and also flat to the base surface 109 is aligned.
  • the shaped sprue 65 of the preform 14 can be seen in the region of the central longitudinal axis 110.
  • the base segment 111 is designed as a flat surface and is circular in its plan shape.
  • the transition between the base segment 111, which is recessed in relation to the base 109, and the base 109 takes place through a partial area of a cone shell 115 which, starting from the container base 33, is tapered in the direction of the bottle neck 18 in the direction of the bottle neck 18 Container bottom 33 towards the base segment 111, this is arranged recessed by the depth 118 relative to the base 109 in the direction of the bottle neck 18.
  • This special design of the bottom region 47 or the container bottom 33 is therefore chosen such that on the one hand a standing surface 109 is achieved which is distant from the central longitudinal axis 110 and on the other hand a structurally favorable design of the container bottom 33 is achieved.
  • the container 159 or reusable container in a view from above, in which on the one hand the cross-sectional shape and on the other hand the formation of the transition area 38 of the container 159 or reusable container can be seen.
  • the container 159 or reusable container has the cross section flattened by the enveloping circle 39 and with the side surfaces 40, the circular segments 103 of the schematically indicated enveloping circle 39 still being present between the side surfaces 40.
  • the enveloping circle 39 has the diameter 119, which is greater than the distance 120 between two mutually opposite side surfaces 40.
  • the distance 120 between the mutually associated and opposite side surfaces 40 is chosen to be the same in this exemplary embodiment and is arranged concentrically to the central longitudinal axis 110.
  • the individual circular segments 103 between the side surfaces 40 simultaneously form the corner regions 121 of the container 159 or reusable container, which are designed in such a way that the ability of the individual containers 159 or reusable containers to juggle one another and thus a reduced space requirement for the washing process and the supply to the filling plants is reached.
  • This makes it possible to use this type of container 159 or reusable container instead of glass bottles without major retrofitting of the filling and washing systems.
  • the transition region 38 between the bottle neck 18 and the upper abutting edge 45 has a further special design.
  • the neck neck 122 which runs all around and has a uniform radius of curvature, adjoins the bottle neck 18 in the direction of the upper joint edge 45.
  • the neck radius 122 forms the spatial shape of part of a spherical cap that is curved outwards.
  • a parallel and continuously curved transition surface 123 is assigned to each side surface 40 of the container 159 or reusable container, with which a taper of the transverse cut of the container 159 or reusable container, starting from the upper butt edge 45 to the bottle neck 18, can also be achieved also assigned vertically curved corner area surface 124. Both the transition surface 123 and the corner region surface 124 are curved toward the outside.
  • Bottles Due to the transition surfaces 123 to the bottle neck 18, each of which has a large radius in the transition area 38, a high volume can be filled into the container 159 or reusable container, as a result of which the overall height 41 compared to containers 159 or reusable containers or reusable containers which are slimmer in these regions Bottles can be made smaller and, in addition to shifting the center of gravity in the direction of the bottom area, a higher durability of the container 159 or reusable container can be achieved. It is advantageous if a diameter of the enveloping circle 39 is between 30% and 70% of the overall height 41 of the container 159 or reusable container.
  • a further transition radius 106 is arranged after the neck radius 122. This also avoids a sharp-edged formation in the area of the surface of the container 159 or reusable container, as a result of which a predefined predetermined breaking point is avoided.
  • the bottle neck 18 starting from the upper edge 125, has on its outer surface parts of threads 160 which cooperate in a form-fitting manner with a screwable and thus reclosable closure cap.
  • the bottle neck 18 already has its final three-dimensional shape after the spraying process, the filling opening 37 being fixed by means of the blowing mandrel attachment 88 only during the stretching and / or blowing process.
  • a mold separation takes place between the upper molded part 12 and the lower mold part 13 or the blow mold 76 in the lower region of the bottle neck 18, that is to say that which is closer to the neck radius 122.
  • the bottle neck 18 furthermore has, at a distance 126, starting from the upper edge 125, the flange 127 and all-round collar 127 which projects outwards beyond the average thickness 66 and which measures the thickness 128 in the direction of the central longitudinal axis 110 , having.
  • This collar 127 has the outer diameter 129, which is approximately that Average inner diameter 130 of the filling opening 37 plus approximately four times the average thickness 66 of the bottle neck 18 corresponds.
  • the outer diameter 129 is at least chosen so large that it is at least equal to or greater than a maximum outer diameter of the closure cap. This ensures that the closure cap cannot be removed or removed from the bottle neck 18 unintentionally, since it extends, starting from the top edge 125 to the top 131 of the collar 127 facing it.
  • the container walls 132 and 133 Due to the final shaping process, namely a preferably combined stretching and / or blowing process from the preform 14, the container walls 132 and 133 now have approximately the same wall thickness 134 and 135 as seen across the cross section of the container 2, 159 or reusable container .
  • the container wall 132 with its wall thickness 134 is assigned to the side surfaces 40 and transition surfaces 123 and the container wall 133 with its wall thickness 135 is assigned to the circular segments 103 or corner region surfaces 124.
  • This roughly the same wall thickness is due to the final shaping process also in the region of the butt edges 45 of the bottom area 47 consistently of approximately the same design and is between 0.5 mm and 2.0 mm.
  • wall thicknesses between 0.4 mm and 2.5 mm, preferably between 0.8 mm and 1.2 mm, are also possible.
  • the preform 14 has the longitudinal central axis 68 in its center, the preform 14 having the starting length 74 in the direction of the longitudinal central axis 68 and thus the preform 14 forming end regions 161, 162 which are spaced apart from one another.
  • the end region 161 is designed as a bottle neck 18 with the filling opening 37, which, as previously described, is already completely defined in its spatial shape during the injection molding process.
  • the bottle neck 18 extends over the length 42 with an outer side 163 in an approximately cylindrical direction in the direction of the end region 162.
  • the design of the bottle neck 18 with its fill opening 37 and that over the outer side 163 is in the direction facing away from the longitudinal central axis 68 projecting collar 127 depending on the choice of the closure device for the finished container 2, 159 or reusable container freely selectable and can for example be designed as a snap or screw closure. But it is of course, any other design of the bottle neck 18 is possible depending on the application.
  • the filling opening 37 has in the region of the open end face of the preform 14 in the end region 161 an opening width with the inside diameter 130 which is continuously tapered due to the bevels of the injection molding tool, in particular the core 15, in the direction of the opposite end region 162. Due to the design of the bottle neck 18 already described, it already has its final spatial shape following the spraying operation, as a result of which a high degree of dimensional accuracy is achieved for the connection of the different closure devices. Because of these conditions, the final wall thickness of the bottle neck 18 is already formed between the outside 163 and the filling opening 37.
  • the preform 14 following the bottle neck 18 up to the end region 162, each has paired side walls 164 which are aligned approximately parallel to one another and which are aligned in a direction perpendicular to the longitudinal central axis 68 Cross-section approximately have a preferably uniform side length 136.
  • the preform 14 forms an approximately square dimension, the individual side walls 164 in their transition region facing one another being rounded off by a curved wall part with the outer rounding 137.
  • the preform 14 viewed over its cross section, preferably has the same wall thickness 16 both in the region of the side walls 164 and in the region of the outer rounding 137.
  • the preform 14 Due to the uniform wall thickness 16, the preform 14 has an inner rounding 166 on the side facing an interior 165 and facing away from the outer rounding 137, the rounding dimension of which is correspondingly adapted to that of the outer rounding 137.
  • both the side walls 164 and the wall parts in the area of the outer roundings 137 are designed with a certain draft, which tapers continuously , starting from the end region 161 to the opposite end region 162.
  • the bottle neck 18 over the length 42 in the area of its outer side 163 an outer diameter 167 which, in cooperation with the inner diameter 130 of the filling opening 37, represents an approximately circular wall section. Due to the cut for FIG. 23 in FIG. 24, it can be seen that the outer roundings 137 between the side walls 164, starting from the cylindrical outside 163 of the bottle neck 18, taper continuously in the direction of the longitudinal central axis 68 and thus the End area 162 are formed. In order to ensure problem-free demolding of the preform 14 from the cavity 11, it is necessary that an outer enveloping circle 168 of the preform 14 in the region of its quadratic design is at least equal to or smaller than the outer diameter 167 of the bottle neck 18.
  • the outer roundings 137 are at an angle of inclination 169 starting from the bottle neck 18 in the direction of the end region 162 inclined towards the longitudinal center axis 68, whereby a simple demolding from the injection mold 9 can be achieved.
  • the preform 14 has a transition region 170 between its quadrant shaft part and the bottle neck 18 in the form of a ring in order to have a roughly uniform side wall 136 with its smaller side length 136 between the angularly aligned side walls 164 To achieve transition to the larger outer diameter 167 of the bottle neck 18.
  • the preform 14 has in its shaft-shaped region a wall thickness 16 that is the same over the cross section, it being necessary for the core 15 to be correctly removed from the preform 14 that an inner dimension 171 be found between two diametrically opposite inner roundings 166 in the region of a transverse plane 172 arranged perpendicular to the longitudinal central axis 68 on the open end face is at least equal to or smaller than the inner diameter 130 in the same transverse plane 172.
  • This inner dimension 171 results from an imaginary extension of the inner roundings 166 up to the point of intersection with the transverse plane 172 in the direction of the respective bevel.
  • the inner curves 166 are inclined at the same angle of inclination 169 as the outer curves 137 with respect to the longitudinal central axis 68.
  • This inner dimension 171 can also be designed as an inner enveloping circle 173 with tangential contact points in the area of the inner curves 166.
  • This inner enveloping circle 173 must likewise be at least equal to or smaller than the inner diameter 130 of the filling opening 37 in order to be able to easily demold the core 15 from the preform 14. As is also shown in FIG.
  • a further transverse plane 174 is parallel to the transverse plane 172 in a A distance which corresponds to the length 42 of the outside 163 in the direction of the end region 162 is arranged, the envelope circle 173 also being tangent to the inner roundings 166 in this transverse plane 174 and being at least equal to or smaller than the inside diameter 130 of the filling opening 37 in the region the transverse plane is 174.
  • This also enables the core 15 to be removed from the interior of the preform 14, as a result of which, for example, a larger angle of inclination 169 of the rounded wall parts or side walls 164 to one another is possible.
  • FIG. 22 shows the preform 14 in a half-section with its side walls 164 which, in relation to the outer roundings 137, extend at approximately the same angle of inclination 175 as the outer roundings 137 in the direction of the longitudinal central axis 68 are formed inclined from the end region 161 in the direction of the end region 162. Different angles of inclination 169, 175 are also possible.
  • the wall thickness 16 in the region of the truncated pyramid-shaped hollow body of the preform 14 is approximately the same across the entire cross section and, depending on the selected initial length 74 of the preform 14 for the containers 2, 159 or reusable containers to be produced therefrom, is between 2 mm and 8 mm, preferably between 3 mm and 5 mm, and in a region of a base part 176 a wall thickness 177 is between 1 mm and 5 mm, preferably between 1.5 mm and 3 mm.
  • the thickness of the wall thickness 16 in the area of the side walls 164 or the outer roundings 137 also depends on the stretching ratio, starting from the initial length 74 of the preform 14 to the finished structural height 41 of the container 2, 159, the general rule being that the shorter the preform or Preform 14 is in relation to the finished overall height 41, the greater its wall thickness 16 is to be made. The longer the preform 14 is formed in its initial length 74 in relation to the finished overall height 41, the smaller the wall thickness 16 can be. In the subsequent stretching and / or blowing process, this wall thickness 16 serves to form the individual container walls and the individual circular segments arranged between them. ment.
  • the side length 136 of the cavity 11 approximately corresponds to between 20% and 60%, preferably between 30% and 45%, of the distance 120 between the side surfaces 40 of the container 2, 159 or reusable container.
  • the configuration for the preform 14 described here can of course also be applied in the same way to the injection molding tool 9 with its cavity 11 and the core 15, so that a detailed description has been omitted here.
  • the same also applies to the inner envelope circle of the cavity 11 in the same plane described above in its tangent contact with the inner rounded portions 137, which is at least equal to or smaller than the outer diameter 167 of the bottle neck 18.
  • FIG. 26 shows a further possible and possibly independent design of the push edges 45 for the container 2 or reusable container, it also being possible, of course, for the container 159 or reusable container to be designed with such push edges 45, again the same for the same parts Reference numerals are used as in the previous figures.
  • the container 26 shows only a partial area of the container 2 or reusable container on an enlarged scale in order to be able to better show and explain the formation of the abutting edges 45 with their outer surfaces 104. It should be mentioned that the two abutting edges 45 are, of course, formed around the cross-section of the container 2 or reusable container and project all around.
  • the upper abutting edge 45 is formed with its outer surface 104 in the area of the transition surface 123 or corner region surface 124 and increases continuously over the width 44 of the abutting edge 45 in the direction of the side surface 40 with its projection over the side surface 40 until the abutting edge 45 protrudes by the extent 105 over the side surface 40.
  • the outer surface 104 of the abutting edge 45 is connected or rounded in the region of its greatest projection over the side surface 40 with a convex transition radius 179.
  • the lower butt edge 45 with its outer surface 104 which is arranged between the container base 33 and the side surface 40, is formed in a mirror image to a mirror plane oriented perpendicular to the central longitudinal axis 110, the outer surface 104 of the lower butt edge 45 starting from the container base 33 in the direction of the side surface 40, increasing in its projection with respect to the side surface 40 or the circular segment 103 up to the greatest possible extent 105.
  • the outer surface 104 of the lower abutting edge 45 is in turn connected or rounded with the convex transition radius 179 to the side surface 40 or the circular segment 103.
  • the arrangement of the inclination of the lower butt edge 45 is selected in mirror image or opposite to the upper butt edge 45 in the region of a side surface 40.
  • the two abutting edges 45 With respect to one another, they each have the greatest projection over the container walls in their regions facing the side surfaces 40 or the circular segments 103.
  • the outer surfaces 104 can also be formed opposite to the inclinations described here.
  • a protected area has been created over the length 48 between the two abutting edges 45 in the area of the side surfaces 40 and circular segments 103 to accommodate, if necessary, detachable marking instructions on the container 2 or reusable container.
  • the dimension 105 of the protrusion can be between 0.1 mm and 1.5 mm, preferably between 0.2 mm and 0.7 mm, for example 0.25 mm or 0.5 mm, with a surface roughness of the outer surfaces 104 can be between 3 ⁇ m and 20 ⁇ m.
  • FIGS. 1; 2, 3; 4; 5 to 9; 10; 11, 12; 13; 14, 15; 16; 17 to 21; 22 to 25; 26 shown embodiments form the subject of independent, inventive solutions.
  • the tasks and solutions according to the invention in this regard can be found in the detailed descriptions of these figures.

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  • 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)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé pour la fabrication de récipients (2) constitués d'un produit brut (5), en particulier un polycarbonate, procédé dans lequel le produit brut (5) est plastifié dans une extrudeuse (4) et est injecté à travers un conduit chauffant (7) dans un outil de moulage par injection (24) pour obtenir une préforme (14). La préforme (14) est ensuite insérée dans un outil de formage (24) et est évasée au volume désiré, par amenée d'un fluide sous pression dans un espace intérieur de la préforme (14). Le récipient (2) est ensuite retiré de l'outil de formage (24). Un noyau (15) et une cavité (11) de l'outil de moulage par injection (9) sont maintenus, pour la production de la préforme (14), à des températures différentes, supérieures à 70 °C. La cavité (11) est maintenue à une température supérieure à celle du noyau (15).
EP96922681A 1995-07-26 1996-07-23 Procede et dispositif pour la fabrication de recipients Withdrawn EP0799119A2 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AT126895 1995-07-26
AT1268/95 1995-07-26
AT126995 1995-07-26
AT1269/95 1995-07-26
PCT/AT1996/000132 WO1997004944A2 (fr) 1995-07-26 1996-07-23 Procede et dispositif pour la fabrication de recipients

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EP0799119A2 true EP0799119A2 (fr) 1997-10-08

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EP96922681A Withdrawn EP0799119A2 (fr) 1995-07-26 1996-07-23 Procede et dispositif pour la fabrication de recipients

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AU (1) AU6348196A (fr)
WO (1) WO1997004944A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003222811A1 (en) 2002-04-16 2003-10-27 Rundpack Ag Receptacle and method for producing the same
DE102010003350A1 (de) 2010-03-26 2011-09-29 Krones Ag Verfahren zum Herstellen von Kunststoffbehältern
DE102012109193A1 (de) * 2012-09-27 2014-03-27 B. Braun Avitum Ag Medizinischer Behälter, insbesondere Infusionsbehälter, sowie Herstellungsverfahren hierfür

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Publication number Priority date Publication date Assignee Title
FR1406520A (fr) * 1964-05-20 1965-07-23 Owens Illinois Glass Co Procédé et appareil pour fabriquer un article soufflé
US4054629A (en) * 1976-01-22 1977-10-18 American Can Company Transfer blow molding technique
US4473515A (en) * 1980-09-02 1984-09-25 Ryder Leonard B Injection blow molding method
CA1285113C (fr) * 1986-08-11 1991-06-25 John J. Granata Methode et dispositif de moulage par injection et soufflage de contenants pour animaux familiers
US4880593A (en) * 1988-01-11 1989-11-14 Plasticon Patents, S.A. Method for preparing blow molded plastic container
US5250335A (en) * 1989-06-23 1993-10-05 Toyo Seikan Kaisha, Ltd. Polyester vessel for drink and process for preparation thereof
EP0411465A3 (en) * 1989-07-31 1992-05-13 Nkk Corporation Method of molding polysilazane

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Title
See references of WO9704944A3 *

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WO1997004944A2 (fr) 1997-02-13
WO1997004944A3 (fr) 1997-04-17

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