EP0868282A2 - Procede de fabrication de recipients - Google Patents

Procede de fabrication de recipients

Info

Publication number
EP0868282A2
EP0868282A2 EP96945887A EP96945887A EP0868282A2 EP 0868282 A2 EP0868282 A2 EP 0868282A2 EP 96945887 A EP96945887 A EP 96945887A EP 96945887 A EP96945887 A EP 96945887A EP 0868282 A2 EP0868282 A2 EP 0868282A2
Authority
EP
European Patent Office
Prior art keywords
preform
container
value
temperature
blowing phase
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.)
Ceased
Application number
EP96945887A
Other languages
German (de)
English (en)
Inventor
Michael Koch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KHS GmbH
Original Assignee
KHS Corpoplast GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7779040&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0868282(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KHS Corpoplast GmbH filed Critical KHS Corpoplast GmbH
Publication of EP0868282A2 publication Critical patent/EP0868282A2/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/16—Biaxial stretching during blow-moulding using pressure difference for pre-stretching, e.g. pre-blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • 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
    • B29C49/18—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using several blowing steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7831—Measuring, controlling or regulating blowing pressure characterised by pressure values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7832—Blowing with two or more pressure levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7832—Blowing with two or more pressure levels
    • B29C2049/7833—Blowing with three or more pressure levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C2049/7879—Stretching, e.g. stretch rod
    • 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0724—Preforms or parisons characterised by their configuration having variable wall thickness 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
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • 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
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B29C2949/0733—Preforms or parisons characterised by their configuration having variable diameter 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
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772—Closure retaining means
    • B29C2949/0773—Threads
    • 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
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0777—Tamper-evident band retaining ring
    • 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
    • B29C2949/0817—Wall thickness of the body
    • 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
    • B29C2949/0861—Other specified values, e.g. values or ranges
    • B29C2949/0862—Crystallinity
    • 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
    • B29C2949/3008—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3012—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3016—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/302—Preforms or parisons made of several components 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
    • B29C49/087—Means for providing controlled or limited stretch ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/122—Drive means therefor
    • B29C49/1222—Pneumatic
    • 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
    • B29C49/42394—Providing specific 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
    • 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
    • B29C49/66—Cooling by refrigerant introduced into the blown article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C49/6604—Thermal conditioning of the blown article
    • B29C49/6605—Heating the article, e.g. for hot fill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/004—Semi-crystalline

Definitions

  • the invention relates to a method for the production of containers, in which a heated preform made of a thermoplastic material is stretched and inflated with the aid of a pressurized gas and in which the inflation process is carried out in a pre-blowing phase with a gas of a lower pressure level and in a subsequent main blowing phase is subdivided with a gas of a higher pressure level.
  • a preform with a step-wise changed wall thickness is known from EP-OS 0 379 264.
  • the outer boundary of the preform wall runs essentially parallel to a longitudinal axis and the inner wall is thickened in a step-like manner in an area facing the floor.
  • a preform with a substantially uniform wall thickness in the direction of its longitudinal extension is described in DE-OS 40 33 531.
  • a special variant for heating a preform with approximately uniform wall thickness is described in DE-OS 42 23 933.
  • Containers which are produced from such preforms can have different properties and uses. Both disposable containers and refillable containers are known. In addition, containers are known which can also withstand elevated temperatures during filling or when carrying out washing processes.
  • Such a container can be shaped, for example, by first producing a preform from polyethylene terephthalate (PET) using the injection molding process, heating the preform after intermediate storage and then feeding it to the blowing station.
  • PET polyethylene terephthalate
  • preforms from pipe sections which are closed in the region of one end and provided with a suitable mouthpiece in the region of their other end.
  • the preform has a substantially smaller shape than the container to be produced. Compressed air is therefore applied to the preform within the blowing station in order to form it into the container to be produced.
  • the material is oriented. This means that the thin wall of the container has a very high degree of dimensional stability, which makes the container suitable for a variety of uses.
  • preforms cannot meet all the requirements for a Material distribution in the finished container to be made.
  • the geometry and the temperature of the preform have a significant influence on the material distribution in the blown container.
  • the aim is to have wall thicknesses that are as small as possible, but which nevertheless have high strength due to a very high bidirectional orientation.
  • a uniform wall thickness is sought in the area of the side wall of the container and the aim is to leave as little non-oriented material as possible in the area of the bottom of the container.
  • Non-oriented material which is left in the amorphous state, tends to be susceptible to cracking and thus impairs the resistance of the container.
  • Known methods for improving the barrier properties use, for example, multilayer preforms in which one or more of the layers have special properties for reducing the gas permeability.
  • these multilayer preforms are expensive, on the one hand, and, on the other hand, the possibilities for recycling are greatly reduced by the material combinations.
  • copolymers or to use blends for example composed of PET and PEN.
  • the ratio of the container diameter to the inner diameter of the preform is chosen to be greater than 4.0, that the preform has an average wall thickness of greater than 3 millimeters, that at least at the beginning of the pre-blowing phase a material temperature is to be determined ⁇ rende range of greater than 70 degrees Celsius is provided that the preform at least at the beginning of the preliminary phase in the area to be oriented has an average temperature of its outer surface, the highest equal to an average temperature of the inner
  • the surface of the preform in the area to be oriented is that the duration of the pre-blowing phase is chosen to be less than 1.0 second and that during the pre-blowing phase the preform is expanded to at least 50 percent of the volume intended for the finished blown container .
  • the actual choice of the average wall thickness of the preform is made as a function of the actual container size, in particular as a function of the container volume.
  • the combination of the preform dimensioning selected as a function of the container dimensioning, the choice of temperature relative to the temporal sequence of the expansion process, the temperature distribution in the preform and the temporal coordination of the pre-blowing phase and the main blowing phase relative to the respective volume of an intermediate product mean that End product has significantly improved properties relative to the prior art due to the material properties achieved in order to reduce the gas permeability. Particularly in combination with a suitable choice of material for the thermoplastic material, significant improvements can be achieved.
  • the permeability to carbon dioxide it was determined, for example by measurement, that in a test batch of containers within a period of 10 weeks the loss of carbon dioxide was less than 15 percent of the amount of carbon dioxide contained in the filled liquid.
  • 1 a longitudinal section through a preform
  • 2 shows a longitudinal section through a container designed as a bottle
  • FIG. 3 shows a perspective illustration of a blow molding station for producing containers from preforms
  • FIG. 4 shows a longitudinal section through a blow mold in which a preform is stretched and expanded
  • a preform (1) consists of a mouth section (2), a support ring (4) separating the mouth section (2) from a neck area (3), and a neck area (3) into a wall section ( 5) overlapping shoulder area (6) and a floor (7).
  • the support ring (4) extends beyond the mouth section (2) to form a longitudinal axis (8).
  • the outer diameter of the preform (1) widens from the neck area (3) in the direction of the wall section (5).
  • the Wall section (5) essentially from the side wall of the container.
  • the bottom (7) is rounded.
  • the mouth section (2) can be provided, for example, with an external thread (12), which enables a screw closure to be placed on the finished container (13).
  • an external thread (12) which enables a screw closure to be placed on the finished container (13).
  • a large number of further designs are also conceivable in order to enable plug-in closures to be attached.
  • the wall section (5) has an inner surface (9) and an outer surface (10).
  • the inner surface (9) delimits a preforming interior (11).
  • the thickness of a preform wall (14) can extend from the neck area (3) in the direction of the wall area (5) with increasing wall thickness.
  • the preform (1) has a preform length (15) in the direction of the longitudinal axis (8).
  • the mouth region (2) and the support ring (4) extend with a common mouth length (16).
  • the neck region (3) has a neck length (17) in the region of the longitudinal axis (8).
  • the preform (3) preferably extends with a constant wall thickness.
  • the preform (1) has a wall thickness (18) in the wall area (5) and a floor thickness (19) can be found in the area of the bottom (7). A further dimensioning of the preform (1) takes place with the aid of an inside diameter (20) and an outside diameter (21), which are measured in the approximately cylindrical wall area (5).
  • the mouth section (2) and the support ring (4) can be found essentially unchanged.
  • the further area of the container (13) is expanded relative to the preform (1) by the biaxial orientation carried out both in the transverse direction and in the longitudinal direction.
  • the container (13) has a container length (22) and a container diameter (23) which, in view of the accuracy to be taken into account, is not to be distinguished below with regard to the concrete inside diameter or outside diameter.
  • the container (13) has a side wall (24) and a container base (25).
  • the container bottom (25) consists of a base ring (26) and a dome (28) which is curved inwards in the direction of a container interior (27).
  • the dome (28) is formed from a dome slope (29) and a center (30).
  • the container (13) has a container mouth length (31) and a container neck length (32), at least the container mouth length (31) generally being equal to the mouth length (16) of the preform (1).
  • Heating the preform (1) before the orientation process is conceivable in different variations.
  • the temperature is only dependent on the length of stay.
  • radiant heaters which are the preform (1) apply infrared or high-frequency radiation. With the help of such radiators it is possible to generate a temperature profile in the area of the preform (1) in the direction of the longitudinal axis (8).
  • such a radiant heater is constructed from a plurality of heating elements which can be controlled independently of one another and which are arranged one above the other in the direction of the longitudinal axis (8), the heating elements in the region of the upper ones in the direction of the mouth section (2) can be controlled more intensively Expansion of the preform (1) in the thickened area of the wall section (5) a higher thermal energy is radiated than in the area of the wall section (5) facing the bottom (7).
  • radiant heaters which can only be controlled uniformly, such a heat profile can also be achieved by arranging the heating elements at different distances in the direction of the longitudinal axis (8).
  • FIG. 3 The basic structure of a device for shaping the preform (1) into the container (13) is shown in FIG. 3 and in FIG. 4.
  • the device for molding the container (13) essentially consists of a blow molding station (33) which is provided with a blow mold (34) into which a preform (1) can be inserted.
  • the preform (1) can be an injection molded part made of polyethylene terephthalate.
  • the blow mold (34) consists of mold halves (35, 36) and a base part (37) which can be lifted ( 38) positionable.
  • the preform (1) can be held in the area of the blowing station (33) by a transport mandrel (39) which passes through a plurality of treatment stations within the device together with the preform (1).
  • a connecting piston (40) is arranged below the transport mandrel (39), which feeds compressed air to the preform (1) and at the same time seals against the transport mandrel (39).
  • a connecting piston (40) is arranged below the transport mandrel (39), which feeds compressed air to the preform (1) and at the same time seals against the transport mandrel (39).
  • the preform (1) is stretched with the help of a stretching rod (41) which is positioned by a cylinder (42).
  • a stretching rod (41) which is positioned by a cylinder (42).
  • the use of curve segments is particularly expedient when a plurality of blowing stations (33) are arranged on a rotating blowing wheel.
  • the use of cylinders (42) is expedient if stationary blowing stations (33) are provided.
  • the stretching system is designed in such a way that a tandem arrangement of two cylinders (42) is provided.
  • the stretching rod (41) is moved from a primary cylinder (43) to the area of the bottom (7) of the preform (1) before the actual stretching process begins.
  • the primary cylinder (43) is extended Stretching rod together with a carriage (44) carrying the primary cylinder (43) from a secondary cylinder (45) positioned.
  • the secondary cylinder (45) in a cam-controlled manner in such a way that a current stretching position is specified by a guide roller (46) which slides along a cam track during the execution of the stretching process.
  • the guide roller (46) is pressed against the guide track by the secondary cylinder (45).
  • the carriage (44) slides along two guide elements (47).
  • FIG. 5 shows the basic structure of a blowing machine which can be used with a rotating heating wheel (52) and a rotating blowing wheel (53).
  • a preform dispenser 54
  • the preforms (1) are transported by transfer wheels (55, 56) into the area of the heating wheel (52).
  • Radiant heaters (57) and blowers (58) are arranged along the heating wheel (52) in order to temper the preforms (1).
  • the preforms (1) After the preforms (1) have been adequately tempered, they are transferred to the heating wheel (52), in whose area the blowing stations (33) are arranged.
  • the finished blown containers (13) are fed from further transfer wheels to an output section (59).
  • thermoplastic material can be used as the thermoplastic material.
  • PET PET, PEN or PP can be used.
  • the preform (1) is dimensioned relative to the container (13) in such a way that a ratio of the container diameter (23) to the inner diameter (20) of the preform (1) of greater than 4.0 is selected.
  • the preform (1) has a wall thickness (18) of greater than 3 millimeters in the wall area (5).
  • the ratio of the container diameter (23) to the inside diameter (20) is preferably greater than 5.0.
  • a range of values from 5.2 to 5.8 has proven to be particularly expedient.
  • the wall thickness (18) in particular dimensioning greater than 4.0 millimeters is intended.
  • An interval in the range from 4 millimeters to 5 millimeters has proven to be particularly advantageous.
  • the specific determination of the wall thickness (18) takes place as a function of the volume of the container (13) to be produced.
  • a temperature of greater than 70 degrees Celsius is provided in the region of the preform (1) to be oriented, at least at the beginning of the orientation process.
  • temperatures greater than 80 degrees Celsius are thought of.
  • Has been particularly advantageous an interval of 85 degrees Celsius to 100 degrees Celsius has been found.
  • the stretching rod (41) is moved into the interior of the preform (11). After the stretching rod (41) has been placed in the region of the bottom (7) of the preform (1), the stretching process begins.
  • a stretching speed of greater than 0.8 meters per second is considered.
  • An interval of 1.0 meter per second to 1.2 meter per second has proven to be particularly advantageous.
  • the preform (1) is expanded during the orientation process by supplying compressed air.
  • the compressed air supply is divided into a pre-blowing phase in which gas is supplied at a low pressure level and a subsequent main blowing phase in which gas is supplied at a higher pressure level.
  • Compressed air with a pressure in the interval from 10 bar to 25 bar is used during the pre-blowing phase and compressed air with a pressure in the interval from 25 bar to 40 bar is fed in during the main blowing phase.
  • the duration of the pre-blowing phase is at most 1.0 second.
  • the container (13) to be produced is expanded to at least 50 percent of its intended final volume. In the case of special shapes of the container (13), pressures above 40 bar can also be appropriate, so that a pressure in the main blowing phase of greater than 25 bar is generally appropriate.
  • a temperature of the blow mold (34) in the range from 150 degrees Celsius to 170 degrees Celsius is provided. A value of approximately 160 degrees Celsius is particularly advantageous.
  • the crystallization temperature is hereby predetermined to be greater than 140 degrees Cel ⁇ iu ⁇ .
  • blow mold (34) it is advisable to temper the blow mold (34) to a value which is above the temperature of the preforms (1).
  • the method described above can also be implemented with a cold blow mold (34).
  • the blow molding station (33) With a form locking device, which avoids a gap formation in the area of the boundary surfaces of the mold halves (35, 36) despite the acting internal pressure during the main blowing phase .
  • the container (13) After completion of the stabilization process, the container (13) has a degree of crystallization of greater than 30 percent. A degree of crystallization of 35 percent to 40 percent is particularly advantageous. This results in both mechanical stretching and thermal crystallization.
  • the temperature in the area of the inner surface (9) is greater than that in the area of the outer surface (10).
  • Adequate temperature control within the Wall of the preform (1) is provided for a compensation time before transfer to the blowing station (33).
  • a period of less than 0.5 seconds is particularly contemplated.
  • a value in the interval from 0.1 second to 0.3 second has proven to be particularly advantageous.
  • FIGS. 6 and 7 Possible shapes for containers (13) which have been produced according to the method described above are indicated in FIGS. 6 and 7. A volume of 0.2 liters to 0.7 liters is provided for this container (13). In particular, it is contemplated to produce the containers (13) by stand rings (26) or feet formed as external curvatures independently.
  • the pressure curve (60) is indicated in a coordinate cross that is formed from a time axis (61) and a pressure axis (62).
  • the time axis (61) is scaled in seconds and the pressure axis (62) in bar.
  • the pre-blowing phase is started about 0.5 seconds after the start of the production cycle.
  • the pre-blowing phase lasts approximately 0.2 to 0.25 seconds.
  • the pressure inside the container (13) to be produced initially rises sharply and then passes through an overlay of the expansion process and of Inflows gradually into the final value.
  • the blow mold (34) is vented.
  • the main blowing phase lasts approximately 1.25 seconds and a period of 0.3 seconds to 0.4 seconds is provided for the ventilation.
  • the method according to the invention can also be used in particular in the production of temperature-stable containers.
  • the process steps for realizing the temperature stabilization are also referred to as heat set processes.
  • the container (13) is expanded in a heatable blow mold (34).
  • a heatable blow mold for example, it is possible to heat the walls, a base insert and a threaded insert of the blow mold (34) separately.
  • the mold temperature is typically 150 ° C to 170 ° C. About 160 ° C. are particularly advantageous.
  • the floor insert is typically tempered at 130 ° C. In this way it can be ensured that milky crystallization of regions of the container bottom which are not oriented or are oriented only inadequately is avoided.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Procédé de fabrication de récipients (13), selon lequel on effectue le formage du récipient (13) en étirant une ébauche chauffée (1) réalisée dans un matériau thermoplastique, et en la soufflant au moyen d'un gaz sous pression. L'opération de soufflage s'effectue en deux stades : d'abord une phase de présoufflage au moyen d'un gaz à une pression relativement faible, puis une phase principale de soufflage au moyen d'un gaz à une pression élevée. Le rapport du diamètre (23) du récipient au diamètre intérieur (20) de l'ébauche (1) est supérieur à 4,0. L'ébauche (1) présente une épaisseur moyenne de paroi (18) supérieure à 3 mm et, du moins au début de la phase de présoufflage, la température du matériau dans la zone à orienter est supérieure à 70 DEG C. L'ébauche (1) est soumise, du moins au début de la phase de présoufflage, dans la zone à orienter, sur sa surface extérieure, à une température au plus égale à la température moyenne de la surface intérieure de l'ébauche dans la zone à orienter. La durée de la phase de préchauffage est inférieure à 1,0 seconde. Durant la phase de présoufflage, l'ébauche (1) est expansée à au moins 50 pourcent du volume du récipient (13) entièrement soufflé.
EP96945887A 1995-12-02 1996-11-16 Procede de fabrication de recipients Ceased EP0868282A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1995145024 DE19545024B4 (de) 1995-12-02 1995-12-02 Verfahren zur Herstellung von Behältern
DE19545024 1995-12-02
PCT/DE1996/002212 WO1997020677A2 (fr) 1995-12-02 1996-11-16 Procede de fabrication de recipients

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EP0868282A2 true EP0868282A2 (fr) 1998-10-07

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EP96945887A Ceased EP0868282A2 (fr) 1995-12-02 1996-11-16 Procede de fabrication de recipients

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US (1) US6168749B1 (fr)
EP (1) EP0868282A2 (fr)
AU (1) AU1718097A (fr)
DE (1) DE19545024B4 (fr)
WO (1) WO1997020677A2 (fr)

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DE10142988A1 (de) * 2001-09-01 2003-03-20 Sig Corpoplast Gmbh & Co Kg Vorrichtung zur Verteilung von Flüssigkeiten
KR20040050926A (ko) * 2001-10-24 2004-06-17 페쉬니 앙발라쥬 플렉서블 유럽 폴리프로필렌 용기 및 그 제조 방법
DE112004002144D2 (de) 2003-09-05 2006-07-13 Sig Technology Ltd Verfahren und Vorrichtung zur Blasformung von Behältern
EP1518658A1 (fr) * 2003-09-29 2005-03-30 Technoplan Engineering S.A. Procédé de soufflage et dispositif de mise en oeuvre
US7052644B2 (en) * 2003-11-17 2006-05-30 Graham Packaging Pet Technologies, Inc. Continuous production of molded plastic containers
WO2007083396A1 (fr) * 2006-01-20 2007-07-26 Toyo Seikan Kaisha, Ltd. Procede de fabrication de bouteille en polyester orienté biaxialement
US10457437B2 (en) 2006-03-06 2019-10-29 Plastipak Packaging, Inc. Lightweight plastic container and preform
US8857637B2 (en) 2006-03-06 2014-10-14 Plastipak Packaging, Inc. Lightweight plastic container and preform
DE202009006684U1 (de) 2009-05-08 2009-08-27 Druckluft-Technik Chemnitz Gmbh Vorrichtung zur Reduzierung der für den Blasformprozess erforderlichen Druckluft
DE102012101653A1 (de) * 2012-02-29 2013-08-29 Krones Ag Preformtransport mit individueller Auswurfmöglichkeit
DE202014008975U1 (de) 2014-12-19 2015-01-30 Bernd Faust Blasdorn für Extrusionsmaschinen zur Herstellung von Hohlraumverpackungen

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Also Published As

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WO1997020677A2 (fr) 1997-06-12
DE19545024B4 (de) 2005-02-17
DE19545024A1 (de) 1997-06-05
US6168749B1 (en) 2001-01-02
WO1997020677A3 (fr) 1997-07-10
AU1718097A (en) 1997-06-27

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