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US20100092711A1 - Mold and method for manufacturing two-layered preforms by injection overmolding, and two-layered preform - Google Patents

Mold and method for manufacturing two-layered preforms by injection overmolding, and two-layered preform Download PDF

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Publication number
US20100092711A1
US20100092711A1 US12/575,711 US57571109A US2010092711A1 US 20100092711 A1 US20100092711 A1 US 20100092711A1 US 57571109 A US57571109 A US 57571109A US 2010092711 A1 US2010092711 A1 US 2010092711A1
Authority
US
United States
Prior art keywords
layer
overmolding
primary molding
core
cavity
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.)
Abandoned
Application number
US12/575,711
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English (en)
Inventor
Angel ATANCE ORDEN
Alain Viron
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.)
Molmasa Aplicaciones Tecnicas SL
Original Assignee
Molmasa Aplicaciones Tecnicas SL
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 Molmasa Aplicaciones Tecnicas SL filed Critical Molmasa Aplicaciones Tecnicas SL
Assigned to MOLMASA APLICACIONES TECNICAS, S.L. reassignment MOLMASA APLICACIONES TECNICAS, S.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ATANCE ORDEN, ANGEL, VIRON, ALAIN
Publication of US20100092711A1 publication Critical patent/US20100092711A1/en
Priority to US13/606,155 priority Critical patent/US8551592B2/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1684—Injecting parison-like articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B29C45/1625—Injecting parison-like articles
    • 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
    • B29C45/26—Moulds
    • B29C45/36—Moulds having means for locating or centering cores
    • 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
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/08—Injection 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
    • 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
    • B29C2949/073—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
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0761—Preforms or parisons characterised by their configuration characterised by the shape characterised by overall the shape
    • B29C2949/0767—Preforms or parisons characterised by their configuration characterised by the shape characterised by overall the shape the shape allowing stacking or nesting
    • 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
    • B29C2949/076—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
    • B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by 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
    • B29C2949/30—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
    • B29C2949/3016—Preforms or parisons made of several components at body portion
    • B29C2949/3018—Preforms or parisons made of several components at body portion partially
    • 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
    • B29C2949/3022—Preforms or parisons made of several components at bottom portion partially
    • 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
    • B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
    • 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
    • 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
    • B29C2949/3034—Preforms or parisons made of several components having components being injected having two or more 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
    • 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
    • B29C45/26—Moulds
    • B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
    • 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
    • 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
    • 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
    • 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
    • B29K2105/258—Tubular
    • 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
    • B29K2507/00—Use of elements other than metals as filler
    • B29K2507/04—Carbon
    • 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
    • B29K2509/00—Use of inorganic materials not provided for in groups B29K2503/00 - B29K2507/00, as filler
    • B29K2509/02—Ceramics
    • 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
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0025—Opaque
    • 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
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/003—Reflective
    • 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
    • B29K2995/0055—Resistive to light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y10T428/1393—Multilayer [continuous layer]

Definitions

  • the present invention relates to a mold and a method for manufacturing two-layered preforms by plastic injection overmolding, including means for stably supporting a mold core inside a corresponding mold cavity while an injection step for injecting a plastic material into said cavity is performed.
  • the present invention also relates to a two-layered preform provided with an inner layer of a material capable of providing a barrier effect against light by absorption and an outer layer of a material capable of providing a barrier effect against light by reflection, such two-layered preform being applicable, for example, to the formation of bottles of milk.
  • preforms for manufacturing bottles and other containers are well known. These preforms consist of tubular bodies of plastic material, with a mouth at a first end, a closed bottom at an opposite second end, and a neck adjacent to the mouth, which optionally includes an outer thread and a perimetric annular flange.
  • the preforms are intended for the subsequent manufacture of plastic bottles by blowing the blind tubular part of the preform inside a mold without the neck and the mouth being altered.
  • Two-layered preforms in which at least part of said tubular body is formed by two superimposed layers having different properties are increasingly used.
  • These two-layered preforms are especially designed for packages requiring a layer with barrier property, for example, barrier against light or against certain gases such as O 2 and CO 2 , packages in which an outer layer can be made of a recycled plastic material and an inner layer of a quality plastic material, or packages formed by two layers of plastic materials of a different color for aesthetic purposes.
  • barrier property for example, barrier against light or against certain gases such as O 2 and CO 2
  • packages in which an outer layer can be made of a recycled plastic material and an inner layer of a quality plastic material or packages formed by two layers of plastic materials of a different color for aesthetic purposes.
  • Two-layered preforms can be manufactured by several techniques, among which injection overmolding is emphasized, which basically consists of first introducing a core in a primary molding cavity for molding a first layer of a primary molding material on the core, and then introducing said core, with said first layer arranged thereon, in an overmolding cavity for molding a second layer of an overmolding material on the first layer to produce the complete two-layered preform.
  • the neck of the two-layered preform can be formed with the material of the first layer or with the material of the second layer by closing and opening a pair of neck half-molds arranged next to the mouth of the primary molding cavity or of the overmolding cavity, respectively.
  • the molds for producing two-layered preforms in many injection overmolding apparatuses comprise multiple primary molding cavities, multiple overinjection cavities, multiple pairs of neck half-molds and multiple grouped cores which are operated together by the injection overmolding apparatus for large productions.
  • a common problem in the molds of any type of apparatus for manufacturing two-layered preforms by injection overmolding is that the cores, due to their slenderness and to their long cantilevered portion, can be slightly deformed elastically inside the primary molding cavities during the injection of the primary molding material of the first layer due to the differences in the temperature, and therefore in the fluidity, of the plastic material injected in an initial phase and in a final phase of the injection process, and to the random distribution of this material with different degrees of fluidity inside the empty space defined between the primary molding cavity and the core.
  • the injection nozzle is generally arranged in a closed bottom of the primary molding cavity facing a free end of the core.
  • U.S. Pat. No. 3,301,928 proposes supporting the core inside the molding cavity by means of a supporting appendage extending from a valve body of an injection valve for injecting molding material arranged in the closed bottom of the cavity.
  • the valve body is axially movable in alignment with the axis of the cavity and the core, and the mentioned supporting appendage has a conical head which is coupled in a conical recess formed at the end of the core whereas the valve is open to inject the molding material into the cavity.
  • the valve body is retracted to allow completely filling the cavity and to then close the passage of molding material into the cavity.
  • U.S. Pat. No. 4,086,315 discloses an apparatus for producing hollow plastic bodies by injection molding a preform on a core introduced in an injection molding cavity and subsequent blowing said preform inside a blow molding cavity. Supports projecting from an area of the closed bottom of the injection cavity make contact with the end of the core to coaxially support it during the entire injection molding operation. These supports leave holes in the preform.
  • the injection molding cavity is furthermore configured to form a protrusion at the axial end of the preform.
  • the core is extracted from the injection molding cavity and then introduced, with the recently formed and still hot preform thereon, in the blow molding cavity for the blow molding operation.
  • a cylinder with an axially operated piston to press said protrusion of the preform against the end of the core for the purpose of extruding the material of said protrusion and thus close the holes existing in the preform before the blow molding.
  • a drawback of this arrangement is that the incorporation of the cylinder and piston assembly at the end of the blow molding cavity is complex and expensive.
  • the preforms are to be allowed to cool in order to remove them from the core and store them for a subsequent distribution and use in a plurality of blow molding apparatuses, this would limit the use of such preforms with holes to only those blow molding apparatuses which are equipped with the mentioned cylinder and piston assembly to extrude the protrusion and close the holes before the blow molding operation.
  • the apparatus is intended to manufacture monolayer preforms and in the specification is not described nor suggested the way to use it to manufacture two-layered preforms.
  • Patent EP-A-1681239 describes a multilayer preform obtained by a sequential co-injection process and having inner and outer layers made of PET colored with titanium dioxide to reflect light and a layer made of PET colored with carbon black to absorb light arranged between said inner and outer layers.
  • a drawback related with the sequential co-injection process in comparison with the overmolding process I that the former is not suitable for injecting only two layers forcing to inject an odd number thereof, in general three or five. It neither permits to accurately control the extent of the intermediate layer or layers nor the uniformity in the width of the layers.
  • a lack of precision in the preform can result in irregularities in a container obtained by blow molding the preform, and such irregularities will be the more accentuated the more thinner are the layers of the preform.
  • WO 95/00325 discloses a multi-layer plastic preform for use in plastic blow molding including an injection molded inner layer of virgin plastic having an outwardly extending annular flange at an open end of the preform.
  • An injection molded outer layer of post consumer recycled plastic covers the inner layer and has a thread for securing a closure, and this thread is located toward the closed end of the preform from the annular flange of the inner layer to thereby provide a construction that allows increased use of the recycled plastic.
  • the preform may be provided with an intermediate layer of a gas barrier material when the container to be blow-molded from the preform is to be used to hold gas pressurized liquids such as soft drinks.
  • the need of the mentioned annular flange in the inner layer at an open end of the preform prevents the possibility of making the neck of the preform only with the material of the outer layer.
  • the present invention contributes to solving the previous and other problems by providing a mold for manufacturing two-layered preforms by plastic injection overmolding.
  • the mold comprises a primary molding cavity connected to a first hot channel for supplying a primary molding material, an overmolding cavity connected to a second hot channel for supplying an overmolding material, and a core configured to first be introduced in said primary molding cavity for a molding operation of a first layer of said primary molding material, and to then be introduced, with said first layer arranged thereon, in said overmolding cavity for an overmolding operation of a second layer of said overmolding material.
  • the mold of the present invention is characterized in that it includes at least one supporting member arranged between a free end of said core and the primary molding cavity to support the core in the primary molding cavity during the entire molding operation of the first layer.
  • the mentioned supporting member is configured to form a corresponding opening in the first layer to be subsequently filled and/or covered by the overmolding material of the second layer.
  • the supporting member which is at least one in number, holds and stabilizes the core in a centered position inside the primary molding cavity and prevents the elastic deformation of the core during the injection operation of the first layer, whereby the thickness of the first layer is substantially uniform around the circumference thereof according to accepted dimensional manufacturing tolerances.
  • the fact that the first layer has a uniform thickness contributes to the second layer, subsequently obtained by injection overmolding in the overmolding cavity, also being substantially uniform.
  • the problem of elastic deformation of the core during the overmolding operation of the second layer is generally less pronounced, and in many cases the second layer has a greater thickness than the first layer and/or has a less relevant function, for example, as a barrier material, whereby a small irregularity in the thickness of the second layer is less relevant than in the first layer.
  • the supporting member is fixed with respect to the primary molding cavity, whereas in a second embodiment of the mold, the supporting member is fixed with respect to the core.
  • the supporting member is fixed with respect to the core.
  • Three supporting members angularly spaced at 120 degrees around a longitudinal central axis of the primary molding cavity and of the core are preferable, since they thus provide an isostatic support, and it is also preferable that the supporting members support the core close to the free end thereof.
  • the supporting members are fixed, they are obviously present during the entire injection operation of the first layer and therefore they form openings in the material of the first layer which are filled and/or covered with the material of the second layer during the injection operation of the second layer by overmolding.
  • the openings in the first layer are empty when the core with the first layer is introduced in the overmolding cavity, and thus the overmolding material of the second layer fills and at the same time covers the openings of the first layer.
  • the openings in the first layer are occupied by the supporting members when the core with the first layer is introduced in the overmolding cavity, such that the overmolding material of the second layer simply covers the openings of the first layer without filling them.
  • the overmolding cavity is preferably configured to form bulges in those regions of the second layer which cover the openings of the first layer.
  • the situation of the openings in the first layer filled and/or covered by the second layer close to the closed bottom of the two-layered preform determines that in the bottle or another container obtained by blow molding from the two-layered preform these openings are located in the base and very close to the center of the bottle or another container, which is a place generally not very exposed, and therefore not very critical. Furthermore, this final area of the preform is deformed relatively little during the blow molding process and the openings are stretched relatively little.
  • the present invention provides a method for manufacturing two-layered preforms by plastic injection overmolding which comprises the steps of first introducing a core in a primary molding cavity connected to a first hot channel and supplying a primary molding material to perform a molding operation of a first layer, and then introducing said core, with said first layer arranged thereon, in an overmolding cavity connected to a second hot channel and supplying an overmolding material to perform an overmolding operation of a second layer.
  • the method of the present invention is characterized in that it comprises supporting a free end of the core with respect to said primary molding cavity during the entire mentioned molding operation of the first layer by means of at least one supporting member and filling and/or covering a corresponding opening left by said supporting member in the first layer with the overmolding material of the second layer.
  • the core is supported by means of one or more fixed supporting members projecting from an inner surface of the primary molding cavity to make contact with the core, and openings produced by the supporting members in the first layer are filled and covered with the overmolding material during the overmolding operation of the second layer.
  • the core is supported by means of one or more fixed supporting members projecting from the core to make contact with an inner surface of the primary molding cavity, and openings produced by the supporting members in the first layer are simply covered with the overmolding material during the overmolding operation of the second layer.
  • the method preferably comprises forming bulges in the regions of the second layer which cover the openings of the first layer by means of depressions formed in the inner surface of the overmolding cavity to provide the two-layered preform with a thickness in the regions in which the openings of the first layer are located equivalent to the thickness of the regions with a double layer.
  • the mold and/or the method of the first and second embodiments can be used in a machine provided with two injection units for injecting two different materials for the two layers of the two-layered preform or two-component preform.
  • a drawback associated with the two-layered preforms of different components obtained by injection overmolding of some synthetic polymers, and especially of polyethylene terephthalate (PET) or polypropylene (PP), according to the prior art, is that the bottles and other containers obtained by blow molding such two-layered preforms show a tendency towards exfoliation or separation of the two layers forming them.
  • the method of the present invention comprises using a synthetic polymer as common base material for both layers, said synthetic polymer being mixed with one or more coloring agents in each layer, at least one of said coloring agents being common in the two layers.
  • said synthetic polymer is polyethylene terephthalate (PET), polypropylene (PP) or high density poliethylene (HDPE), and among the coloring agents which can be used there is titanium oxide (TiO 2 ) (white colorant) in solid or liquid form, and carbon black or carbon (black colorant) in solid, powder or liquid form.
  • PET polyethylene terephthalate
  • PP polypropylene
  • HDPE high density poliethylene
  • the method of the present invention comprises using polyethylene terephthalate (PET), polypropylene (PP) or high density poliethylene (HDPE) with from 0.01% to 2% by weight of carbon black or activated carbon and from 3% to 10% by weight of active ingredients of titanium oxide (TiO 2 ) as primary molding material of the first layer, or inner layer, and using polyethylene terephthalate (PET), polypropylene (PP) or high density poliethylene (HDPE) with from 3% to 10% by weight of active ingredients of titanium oxide (TiO 2 ) as overmolding material of the second layer, or outer layer.
  • PET polyethylene terephthalate
  • PP polypropylene
  • HDPE high density poliethylene
  • This composition is suitable for manufacturing two-layered preforms intended for obtaining milk-containing bottles, in which the outer layer must provide a barrier effect against light by reflection and furthermore offer a final aesthetic appearance of the bottle in relation to its content, i.e., a white appearance which is as pure as possible, and in which the object of the inner layer is to provide a barrier effect against light by absorption.
  • TiO 2 titanium oxide
  • the use of a percentage of titanium oxide (TiO 2 ) in both the inner and outer layers has the dual interest of favoring the adhesion of the two layers to one another and of mixing a proportion of white in the black colorant of the inner layer to cause a gray effect facilitating the optical coating by the outer layer and thus give a deep white appearance to the bottle obtained by blow molding the two-layered preform without this involving a significant decrease in the capacity of the inner layer to offer an efficient barrier against light by absorption.
  • the present invention is not limited to the mentioned base materials and colorants, being it possible to use any other plastic materials which are suitable for manufacturing preforms and/or any other colorants.
  • the mold and/or the method of the present invention can be applied to produce preforms with a very thin wall, for example with a thickness of 2.1 mm or less.
  • most of the wall of the preform is of a single layer provided by the first layer, whereas the second layer is reduced to the region of the closed end of the preform just enough to fill and/or cover the openings produced in the first layer by the supporting members.
  • the same plastic material for example polyethylene terephthalate (PET), polypropylene (PP) or high density poliethylene (HDPE), can be used for the first and second layers, such that the mold can be used with a standard injection machine, i.e., with a single injection unit.
  • the first layer in the single-layer regions can have a thickness which is sufficiently small, for example 2.1 mm or less, and uniform to assure a very thin and uniform wall in the product subsequently obtained by blow molding the preform.
  • the two-layered preform obtained by injection overmolding by means of the mold and method of the present invention typically comprises a tubular body with a mouth at a first end and a closed bottom at an opposite second end. At least part of said tubular body is formed by a first layer of a primary molding material and a second layer of an overmolding material. In the closed bottom, the mentioned first layer comprises one or more openings filled and/or covered by the material of the second layer. As a result of the first layer having been molded with the core supported inside the primary molding cavity, the thickness of the first and second layers of the two-layered preform is substantially uniform around the perimeter of the two-layered preform.
  • FIG. 1 is a schematic cross-sectional depiction of several parts forming a mold for manufacturing two-layered preforms by injection overmolding according to a first embodiment of the present invention, in a position prior to the start of a molding injection operation according to a first embodiment of the method of the present invention;
  • FIG. 1A is an enlarged detail of FIG. 1 to better show a closed bottom of the primary molding cavity
  • FIG. 2 is a schematic cross-sectional depiction of the parts forming the mold of FIG. 1 in a position corresponding to a primary molding step of the method of the present invention
  • FIG. 2A is an enlarged detail of FIG. 2 to better show a closed bottom of the primary molding cavity with the core supported therein and the first layer of the two-layered preform between both;
  • FIG. 3 is a schematic cross-sectional depiction of the parts forming the mold of FIG. 1 in a position prior to an overmolding step of the method of the present invention
  • FIG. 3A is an enlarged detail of FIG. 3 to better show an end of the core with the first layer of the two-layered preform thereon;
  • FIG. 4 is a schematic cross-sectional depiction of the parts forming the mold of FIG. 1 in a position corresponding to the overmolding step of the method of the present invention
  • FIG. 4A is an enlarged detail of FIG. 4 to better show a closed bottom of the overmolding cavity with the core arranged therein and the first and second layers of the two-layered preform between both;
  • FIG. 5 is a cross-sectional view showing the inside of the closed bottom of a two-layered preform according to an embodiment of the present invention
  • FIG. 6 is a perspective view sectioned through the planes indicated as VI-VI in FIG. 5 ;
  • FIGS. 7 to 10 are sectioned views of several examples of two-layered preform obtained with the mold and/or the method of the first embodiment of the present invention.
  • FIG. 11 is a sectioned partial view of another example of two-layered preform obtained with the mold and/or the method of the first embodiment of the present invention.
  • FIG. 12A is a partial view showing a free end of a core belonging to a mold according to a second embodiment of the present invention.
  • FIG. 12B is a sectioned partial view showing the interaction of the core with the primary molding cavity in the mold of the second embodiment during a molding operation of the first layer of the preform according to a second embodiment of the method of the present invention
  • FIG. 12C is a sectioned partial view showing the interaction of the core with the overmolding cavity in the mold of the second embodiment during an overmolding operation of the second layer of the preform according to a second embodiment of the method of the present invention
  • FIG. 13 is a sectioned partial view of an example of two-layered preform obtained with the mold and/or the method of the second embodiment of the present invention.
  • FIG. 14 is a sectioned partial view of another example of two-layered preform obtained with the mold and/or the method of the second embodiment of the present invention.
  • the mold comprises a primary molding cavity 1 , which is connected to a first hot channel 10 for supplying a primary molding material into said primary molding cavity 1 through a first injection nozzle 15 , and an overmolding cavity 2 connected to a second hot channel 20 for supplying an overmolding material into said overmolding cavity 2 through a second injection nozzle 25 .
  • the primary molding cavity 1 and overmolding cavity 2 are stationary, although this is not essential for the present invention.
  • the mold further comprises a core 3 connected to a mobile plate 30 of an injection molding apparatus (not shown) operated to alternately introduce said core 3 into the primary molding cavity 1 and into the overmolding cavity 2 .
  • the mold is completed with a pair of neck half-molds 5 a , 5 b connected to respective mobile elements, which are in turn assembled on a mobile plate 50 of said injection molding apparatus (not shown), which is controlled to close and open the neck half-molds 5 a , 5 b next to the mouth of the overmolding cavity 2 , in a well-known manner.
  • the core 3 has an outer surface configured to cooperate with an inner surface of the primary molding cavity 1 to form a first layer P 1 of the two-layered preform P
  • the mentioned first layer P 1 of the two-layered preform P has an outer surface which together with another outer surface of the core 3 cooperates with an inner surface of the overmolding cavity 2 to form a second layer P 2 of the two-layered preform P
  • the neck half-molds 5 a , 5 b are configured to form a neck 61 of said two-layered preform P together with the second layer P 2 (see FIGS. 7 and 9 ).
  • the neck half-molds 5 a , 5 b are arranged to be closed and opened by the injection molding apparatus next to the mouth of the primary molding cavity 1 , such that the preforms obtained have the neck 61 formed together with the first layer P 1 of the two-layered preform P (see FIGS. 8 and 10 ).
  • the primary molding cavity 1 and overmolding cavity 2 generally have an elongated configuration with respect to a longitudinal axis and have a closed bottom opposite to their mouth.
  • the first and second injection nozzles 15 , 25 are opened in the center of the mentioned closed bottom of the respective primary molding cavity 1 and overmolding cavity 2 .
  • the core 3 generally has an elongated configuration with respect to a longitudinal axis and has a free end which is located adjacent to the closed bottom of each of the primary molding cavity 1 and overmolding cavity 2 when it is introduced therein.
  • Three supporting members 4 (see also the enlarged detail of FIG.
  • the supporting members 4 project from the inner surface of the primary molding cavity 1 , said supporting members 4 being fixed with respect to the primary molding cavity 1 and arranged to make contact with the core 3 when the core 3 is introduced in the primary molding cavity 1 ( FIG. 2 ).
  • the supporting members 4 have a slightly conical configuration and are oriented in a direction parallel to the longitudinal axis of the primary molding cavity 1 to facilitate the extraction of the first layer P 1 from the mold in a direction parallel to the direction of the movement of extraction of the core 3 .
  • the arrangement of three supporting members spaced at angular intervals of 120 degrees around said first injection nozzle 15 in the closed bottom of the primary molding cavity 1 is preferred, since they thus provide an isostatic support for the core 3 , close to the free end thereof, during a molding operation of the first layer P 1 by means of the primary molding material.
  • any number of fixed supporting members 4 arranged to support the core 3 inside the primary molding cavity 1 will be within the scope of the present invention.
  • FIG. 2 shows a first step of the method of the present invention using the mold of FIG. 1 .
  • This first step comprises first introducing the core 3 in the primary molding cavity 1 and supplying the primary molding material through the first hot channel 10 and the first injection nozzle 15 into the empty space defined between the primary molding cavity 1 and the core 3 to perform a molding operation of the first layer P 1 of the two-layered preform P.
  • the method comprises supporting the core 3 during the entire molding operation of the first layer P 1 of the primary molding material by means of the supporting members 4 projecting from the inner surface of the primary molding cavity 1 to make contact with the core 3 .
  • the core 3 Due to the fact that the core 3 is supported by the supporting members 4 during the molding operation of the first layer P 1 , the core 3 is not deformed and the first layer P 1 has a uniform thickness around the perimeter of the two-layered preform P.
  • the supporting members 4 which are in contact with the core 3 during the molding operation form corresponding openings 60 in the first layer P 1 as is better seen in the enlarged detail of FIG. 2A .
  • FIG. 3 shows the core 3 once it has been extracted from the primary molding cavity 1 after molding the first layer P 1 , where the first layer P 1 remains arranged on the core 3 .
  • the enlarged detail of FIG. 3A shows a cross-sectional view of one of the openings 60 , which are empty when the core 3 is removed from the primary molding cavity 1 . It can be observed in FIG. 3 that the core 3 has been aligned with the overmolding cavity 2 ready for the performance of the following step.
  • FIG. 4 shows the following step of the method of the present invention, which comprises introducing the core 3 , together with the first layer P 1 arranged thereon, in the overmolding cavity 2 supplying the overmolding material through the second hot channel 20 and the second injection nozzle 25 to perform an overmolding operation of a second layer P 2 , together with which the neck 61 of the two-layered preform P is formed by means of the closed neck half-molds 5 a , 5 b next to the mouth of the overmolding cavity 2 .
  • the overmolding material fills and covers the openings 60 which had been formed by the supporting members 4 in the first layer P 1 during the molding operation in the primary molding cavity 1 .
  • the enlarged detail of FIG. 4A shows a cross-sectional view of one of the openings 60 in the first layer P 1 filled with the material of the second layer P 2 .
  • the core 3 is extracted from the overmolding cavity 2 with the two-layered preform P finished thereon, the two-layered preform P is ejected from the core 3 by a conventional ejection device (not shown) of the injection molding apparatus, and the bare core 3 is again aligned with the primary molding cavity 1 ( FIG. 1 ) ready for starting a new cycle.
  • FIGS. 5 and 6 show the closed bottom of a two-layered preform P obtained by means of the mold and/or the method of the first embodiment of the present invention described above in relation to FIGS. 1 to 4 .
  • the two-layered preform P is comprised of a first layer P 1 of a primary molding material and a second layer P 2 of an overmolding material.
  • the first layer P 1 includes openings 60 filled with the material of the second layer P 2 .
  • the openings 60 are a result of the presence of the supporting members 4 in contact with the core 3 during the molding operation of the first layer P 1 .
  • the thickness of both the first and second layers P 1 , P 2 is substantially uniform around the perimeter of the two-layered preform P.
  • FIG. 7 depicts an example of two-layered preform P obtained by means of the mold and/or the method of the first embodiment of the present invention, and especially designed for obtaining bottles for containing milk by means of a subsequent blow molding process.
  • This two-layered preform P has the form of a tubular body with a mouth 62 at a first end and a closed bottom at an opposite second end. A part of said tubular body is formed by a first layer P 1 of a primary molding material and a second layer P 2 of an overmolding material.
  • the first layer P 1 of the two-layered preform P preferably has a thickness equal to or less than 1.8 mm and is sufficiently uniform to produce a very thin and uniform inner layer in a bottle subsequently obtained by blowing the two-layered preform P.
  • the mentioned primary molding material forming the first layer P 1 which is the inner layer, is polyethylene terephthalate (PET), polypropylene (PP) or high density poliethylene (HDPE) with from 0.01% to 2% by weight of carbon black or activated carbon and from 3% to 10% by weight of active ingredients of titanium oxide (TiO 2 ).
  • the overmolding material forming the second layer which is the outer layer, is likewise polyethylene terephthalate (PET), polypropylene (PP) or high density poliethylene (HDPE) but only with from 3% to 10% by weight of active ingredients of titanium oxide (TiO 2 ).
  • the first layer P 1 or inner layer
  • the second layer P 2 or outer layer
  • the first layer P 1 has an opaque dark gray color and performs a function of barrier against light by absorption
  • the second layer P 2 or outer layer
  • a proportion of one and the same coloring agent, such as titanium oxide (TiO 2 ) is present in the material of both layers P 1 , P 2 favors a suitable adhesion of the two layers P 1 , P 2 to one another and prevents exfoliation.
  • the first layer P 1 comprises openings 60 filled with the material of the second layer P 2 .
  • the mentioned openings are located in the closed bottom of the two-layered preform P, arranged at angular spaces of 120 degrees around the longitudinal central axis of the two-layered preform P and close to the center of said closed bottom.
  • the openings 60 in the first layer P 1 are a result of the presence of the supporting members 4 in contact with a core 3 in the primary molding cavity 1 of the mold in which the molding operation of said first layer P 1 has been performed, and the fact that the first layer P 1 has been molded with the core 3 being supported results in the thickness of said first and second layers P 1 , P 2 being substantially uniform around the perimeter of the two-layered preform.
  • this two-layered preform P designed for obtaining bottles for containing milk has a neck 61 integrally formed from the overmolding material of the second layer P 2 , or outer layer.
  • This neck 61 is formed around said mouth 62 and comprises an outer thread 63 for coupling a stopper and a perimetric annular flange 64 performing an auxiliary function in the handling and bottling lines.
  • the neck 61 of the two-layered preform P has the final dimensions required for the bottle since it is unchanged during the blow molding process.
  • the first layer P 1 does not coat the inner surface of the mouth 62 in the neck 61 , such that the inner surface of the neck 61 visible from the outside has the intense white color of the second layer P 2 .
  • the substantially uniform thickness of the first and second layers P 1 , P 2 as a result of the fact that the first layer P 1 has been molded with the supported core 3 facilitates a precise demarcation of the extent of the first and second layers P 1 , P 2 in the longitudinal direction of the two-layered preform P.
  • the two-layered preform P of FIG. 8 is, in relation to the shape, completely similar to the two-layered preform P shown in FIG. 7 , except in that here the neck 61 is integrally formed from the primary molding material of the first layer P 1 , or inner layer.
  • This two-layered preform P of FIG. 8 is obviously designed for obtaining bottles or other containers intended for other uses and as a result, the materials of the first and second layers P 1 , P 2 are also different from those of the two-layered preform P of FIG. 7 .
  • the first layer P 1 which is the inner layer in contact with the contained liquid, and which includes the neck 61 , can be made of a quality polyethylene terephthalate (PET), polypropylene (PP) or high density poliethylene (HDPE), whereas the second layer P 2 , which is the outer layer and will not be in contact with the contained liquid, can be made of a recycled polyethylene terephthalate (PET), polypropylene (PP) or high density poliethylene (HDPE).
  • PET polyethylene terephthalate
  • PP polypropylene
  • HDPE high density poliethylene
  • FIG. 9 shows a two-layered preform P similar to the one described above in relation to FIG. 7 , although here the two-layered preform P is designed for obtaining wide-mouthed containers, for which the neck 21 and the mouth 62 are relatively wider.
  • FIG. 10 shows a two-layered preform P similar to the one described above in relation to FIG. 8 , with the difference of the second layer P 2 , which in this embodiment externally coats only the closed bottom and a portion, approximately half, of the tubular body of the two-layered preform P.
  • An application of this two-layered preform P of FIG. 10 is, for example, for obtaining bottles of water or drinks with a visual effect of change or combination of colors.
  • the first layer P 1 can be made of a transparent polyethylene terephthalate (PET), optionally containing a proportion of one or more transparent or translucent coloring agents
  • the second layer P 2 can be made of a polyethylene terephthalate (PET) containing a proportion of one or more transparent, translucent or opaque coloring agents.
  • FIG. 11 shows the end corresponding to the closed bottom of a two-layered preform P with a thin wall made by means of the mold and/or the method of the first embodiment of the present invention, in which the first layer P 1 provides a single layer for most of the wall of the preform, optionally including a neck (not shown) at the open end.
  • the second layer P 2 is very small and only covers the region corresponding to the closed bottom of the first layer P 1 filling the openings 60 left by the supporting members 4 .
  • the overmolding cavity 2 could alternatively be configured to form the second layer P 2 with a much smaller thickness and/or with a smaller configuration just enough to assure the flow of the molten overmolding material from the overmolding material injection nozzle 25 to the openings 60 of the first layer P 1 in order to fill them during the overmolding operation.
  • the first and second layers P 1 , P 2 can advantageously be made of the same material.
  • the supporting members 4 are fixed in the core 3 , as shown in FIG. 12A , and project from the free end thereof to make contact with the inner surface of the primary molding cavity 1 ( FIG. 12B ).
  • the core 3 at the free end of the core 3 there are arranged three of said supporting members 4 to make contact with areas of the closed bottom of the primary molding cavity 1 around a primary molding material injection nozzle 15 located coaxially in the primary molding cavity 1 .
  • the openings 60 formed by the supporting members 4 are occupied by the supporting members 4 .
  • the core 3 with the first layer P 1 is then introduced in the overmolding cavity 2 ( FIG. 12C ) and the overmolding material is injected through the overmolding material injection nozzle 25 to form the second layer P 2 , the latter will simply cover the openings 60 of the first layer P 1 without filling them.
  • the overmolding cavity 2 in the closed bottom of the overmolding cavity 2 there are formed depressions 6 arranged around the overmolding material injection nozzle 25 in positions facing the supporting members 4 of the core 3 and openings 60 of the first layer P 1 . These depressions 6 are configured to form bulges 65 in those regions of the second layer P 2 which cover the mentioned openings 60 of the first layer P 1 of the two-layered preform P.
  • the openings 60 of the first layer P 1 are empty but covered by the bulges 65 of the second layer P 2 , such that the thickness of the wall of the two-layered preform P facing the openings 60 is substantially equivalent to the thickness of the wall in the regions provided with a double layer, which provides a substantially uniformity in the stretching of the materials of the first and second layers P 1 , P 2 during a subsequent blow molding operation of the two-layered preform P.
  • FIG. 14 shows another example of two-layered preform P which can be produced by means of the mold and/or the method of the second embodiment of the present invention.
  • the two-layered preform P of FIG. 14 is a preform with a very thin wall, for example of less than 2.1 mm.
  • the first layer P 1 provides a single layer for most of the wall of the preform, optionally including a neck (not shown) at the open end.
  • This first layer P 1 has a thickness equal to or less than 2.1 mm.
  • the second layer P 2 is very small and only covers the region corresponding to the closed bottom of the first layer P 1 , with the bulges 65 of the second layer P 2 covering but not filling the openings 60 left by the supporting members 4 .
  • the second layer P 2 it must be indicated that it is not necessary for the second layer P 2 to cover all the closed bottom of the preform with a thickness substantially equivalent to the thickness of the first layer P 1 .
  • the overmolding cavity 2 can alternatively be configured to form the second layer P 2 with a much smaller thickness and/or with a smaller configuration just enough to assure the flow of the molten overmolding material from the overmolding material injection nozzle 25 to the bulges 65 of the second layer P 2 in order to fill them during the overmolding operation.
  • the first and second layers P 1 , P 2 can advantageously be made of the same material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US12/575,711 2007-04-11 2009-10-08 Mold and method for manufacturing two-layered preforms by injection overmolding, and two-layered preform Abandoned US20100092711A1 (en)

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PCT/ES2007/000202 WO2008125698A1 (fr) 2007-04-11 2007-04-11 Moule et procédé de fabrication de préformes bi-composant par surmoulage par injection et préforme bi-composant obtenue
ESPCT/ES2007/000202 2007-04-11
PCT/ES2008/000226 WO2008125709A1 (fr) 2007-04-11 2008-04-11 Moule et procédé de fabrication de préformes bi-couche par surmoulage par injection et préforme bi-couche

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130129955A1 (en) * 2010-09-01 2013-05-23 Inotech Kunststofftechnik Gmbh Method for Producing a Multilayered Preform and a Preform
WO2014082140A2 (fr) 2012-11-30 2014-06-05 Resilux Procédé de surmoulage pour préformes destinées à être converties en récipients et dispositif pour celui-ci
US20150246468A1 (en) * 2012-09-19 2015-09-03 Alpla Werke Alwin Lehner Gmbh & Co. Kg Device and method for producing a tube head, and tube head
WO2016004486A2 (fr) 2014-06-05 2016-01-14 Resilux Objet creux en plastique, en particulier préforme nervurée pour récipient et procédé de surmoulage de celle-ci et dispositif à cet effet
US20170021552A1 (en) * 2015-07-20 2017-01-26 Ring Container Technologies, Llc Container and method of manufacture
ITUB20155185A1 (it) * 2015-11-06 2017-05-06 Sipa Progettazione Automaz Metodo di rivestimento di stampo di iniezione per preforme
US10059046B2 (en) 2015-06-30 2018-08-28 Braun Gmbh Process for making a multi-component plastic housing
US10226315B2 (en) 2015-06-30 2019-03-12 Braun Gmbh Multi-component plastic housing
US10543633B2 (en) 2015-06-30 2020-01-28 Braun Gmbh Injection molding device comprising movable strippers
US10583625B2 (en) 2015-06-30 2020-03-10 Braun Gmbh Plurality of mass-produced multi-component plastic housings
JPWO2020262595A1 (fr) * 2019-06-28 2020-12-30
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Publication number Priority date Publication date Assignee Title
WO2008125698A1 (fr) * 2007-04-11 2008-10-23 Molmasa Aplicaciones Técnicas, S.L. Moule et procédé de fabrication de préformes bi-composant par surmoulage par injection et préforme bi-composant obtenue
DE102008057138A1 (de) * 2008-11-13 2010-05-20 Novapax Maschinenbau Gmbh & Co. Kg Verfahren zur Herstellung eines Mehrschicht-Kunststoffhohlkörpers und Spritzblasmaschine
WO2012083310A2 (fr) 2010-12-17 2012-06-21 Dispensing Technologies B.V. Préformes améliorées pour applications flair
ES2385812B1 (es) * 2011-01-19 2014-02-07 Linear Overmoulding Applications S.L. Preforma para formación de envases con efecto barrera a la luz por moldeo por estirado-soplado.
JP5888731B2 (ja) * 2012-01-31 2016-03-22 日精エー・エス・ビー機械株式会社 金型装置及び射出成形装置並びに射出成形方法
US8808372B2 (en) * 2012-04-27 2014-08-19 Cold Winter Solutions, L.L.C. Breast implant spacers for the treatment of periprosthetic breast implant infections
NL2009802C2 (en) * 2012-11-13 2014-05-14 Heineken Supply Chain Bv Container, preform assembly and method and apparatus for forming containers.
DE102013022244A1 (de) * 2013-09-30 2015-04-02 Wilo Se Vorrichtung und Verfahren zur Herstellung eines mehrschichtigen hohlen Formteils aus faserverstärktem Kunststoff
WO2015157079A1 (fr) * 2014-04-07 2015-10-15 Silgan Plastics Llc Système et procédé de moulage d'un objet plastique multicouche par utilisation de noyaux de moule multiples
DE102014113535B4 (de) * 2014-09-19 2017-12-21 Inotech Kunstofftechnik Gmbh Spender mit Beutel
EP3144068B1 (fr) * 2014-12-10 2025-04-30 Kobe Bio Robotix Co. Ltd. Récipient servant à contenir/stocker un échantillon
CN104608336A (zh) * 2015-01-26 2015-05-13 中山市美捷时包装制品有限公司 一种型芯与型腔中心定位机构
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EP3243623A1 (fr) 2016-05-13 2017-11-15 Molmasa Aplicaciones Técnicas, S.L. Préforme à deux couches
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301928A (en) * 1963-06-17 1967-01-31 Owens Illinois Inc Method of and apparatus for making a blown plastic article
US4086315A (en) * 1975-08-27 1978-04-25 Tadeusz Piotrowski Production of hollow plastic bodies
US4935184A (en) * 1988-02-05 1990-06-19 Primtec Stabilized injection molding when using a common mold part with separate complimentary mold parts
US20020110654A1 (en) * 2001-02-12 2002-08-15 Cook David L. Light-excluding, multi-layered material

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305892A (en) * 1964-01-02 1967-02-28 Owens Illinois Inc Method and apparatus for making a blown plastic article
JPS5535249B2 (fr) * 1973-04-27 1980-09-12
JPS5951889B2 (ja) * 1979-08-31 1984-12-17 固 青木 射出延伸吹込成形法
US4413974A (en) * 1981-09-21 1983-11-08 Owens-Illinois, Inc. Apparatus for making a multi-layered blown plastic container
EP0429448B1 (fr) 1988-02-05 1994-04-13 Primtec Procede de moulage par injection stabilise lors de l'utilisation d'une partie de moules communes avec des parties de moules complementaires separees
JP3112086B2 (ja) * 1990-09-05 2000-11-27 大日本印刷株式会社 ブロー成形ボトル用遮光性樹脂組成物
AU7092094A (en) 1993-06-18 1995-01-17 Plastipak Packaging, Inc. Multi-layer preform for plastic blow molding
TWI250934B (en) * 1997-10-17 2006-03-11 Advancsd Plastics Technologies Barrier-coated polyester articles and the fabrication method thereof
SE518351C2 (sv) * 1998-05-22 2002-09-24 Tetra Laval Holdings & Finance Förpackningsmaterial och av materialet framställda förpackningar för ljuskänsliga produkter
AU2001288916B2 (en) * 2000-09-05 2007-05-10 Advanced Plastics Technologies Luxembourg S.A. Multilayer containers and preforms having barrier properties utilizing recycled material
DE60133310T2 (de) * 2000-11-08 2009-03-05 Valspar Sourcing, Inc., Minneapolis Mehrschichtige packung mit barriereeigenschaften
ITMO20040354A1 (it) 2004-12-31 2005-03-31 Granarolo S P A Preforma,metodo per produrre una preforma e contenitore.
EP1987936A4 (fr) 2006-02-03 2013-01-16 Molmasa Aplicaciones Tecn S L Appareil et procédé destinés à fabriquer des corps creux constitués de deux matériaux par surmoulage par injection
FR2898293B1 (fr) * 2006-03-08 2012-08-10 Evian Saeme Sa Preforme multicouches a parois minces et son procede d'obtention
PT1970181E (pt) * 2007-03-13 2010-03-29 Minera Catalano Aragonesa Samc Pré-forma para moldagem por sopro de um recipiente
WO2008125698A1 (fr) * 2007-04-11 2008-10-23 Molmasa Aplicaciones Técnicas, S.L. Moule et procédé de fabrication de préformes bi-composant par surmoulage par injection et préforme bi-composant obtenue
JP5286169B2 (ja) * 2009-06-19 2013-09-11 株式会社青木固研究所 延伸ブローボトルのプリフォーム
MX2012005259A (es) * 2009-11-05 2012-06-14 Procter & Gamble Producto empaquetado para proteger una composicion liquida sensible a la luz.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301928A (en) * 1963-06-17 1967-01-31 Owens Illinois Inc Method of and apparatus for making a blown plastic article
US4086315A (en) * 1975-08-27 1978-04-25 Tadeusz Piotrowski Production of hollow plastic bodies
US4935184A (en) * 1988-02-05 1990-06-19 Primtec Stabilized injection molding when using a common mold part with separate complimentary mold parts
US20020110654A1 (en) * 2001-02-12 2002-08-15 Cook David L. Light-excluding, multi-layered material

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130129955A1 (en) * 2010-09-01 2013-05-23 Inotech Kunststofftechnik Gmbh Method for Producing a Multilayered Preform and a Preform
US8795566B2 (en) 2010-09-01 2014-08-05 Inotech Kunststofftechnik Gmbh Method for producing a multilayered preform and a preform
US9981442B2 (en) * 2010-09-01 2018-05-29 Inotech Kunststofftechnik Gmbh Method for producing a multilayered preform and a preform
US20150246468A1 (en) * 2012-09-19 2015-09-03 Alpla Werke Alwin Lehner Gmbh & Co. Kg Device and method for producing a tube head, and tube head
US10040228B2 (en) * 2012-09-19 2018-08-07 Alpla Werke Alwin Lehner Gmbh & Co. Kg Device and method for producing a tube head, and tube head
WO2014082140A2 (fr) 2012-11-30 2014-06-05 Resilux Procédé de surmoulage pour préformes destinées à être converties en récipients et dispositif pour celui-ci
US10828814B2 (en) 2012-11-30 2020-11-10 Resilux Nv Overmoulding method for preforms to be converted into containers and device therefor
WO2016004486A2 (fr) 2014-06-05 2016-01-14 Resilux Objet creux en plastique, en particulier préforme nervurée pour récipient et procédé de surmoulage de celle-ci et dispositif à cet effet
US11534282B2 (en) 2015-06-30 2022-12-27 Braun Gmbh Multi-component plastic housing
US10059046B2 (en) 2015-06-30 2018-08-28 Braun Gmbh Process for making a multi-component plastic housing
US11254084B2 (en) 2015-06-30 2022-02-22 Braun Gmbh Plurality of mass-produced multi-component plastic housings
US10226315B2 (en) 2015-06-30 2019-03-12 Braun Gmbh Multi-component plastic housing
US10543633B2 (en) 2015-06-30 2020-01-28 Braun Gmbh Injection molding device comprising movable strippers
US10583625B2 (en) 2015-06-30 2020-03-10 Braun Gmbh Plurality of mass-produced multi-component plastic housings
US20170021552A1 (en) * 2015-07-20 2017-01-26 Ring Container Technologies, Llc Container and method of manufacture
US10252458B2 (en) * 2015-07-20 2019-04-09 Ring Container Technologies, Llc Container and method of manufacture
WO2017077129A1 (fr) * 2015-11-06 2017-05-11 S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. Procédé pour revêtir un moule d'injection
KR102640139B1 (ko) 2015-11-06 2024-02-23 에스.아이.피.에이. 소시에타’ 인더스트리아리자지오네 프로게타지오네 이 오토마지오네 에스.피.에이. 사출 금형을 코팅하는 방법
US10836087B2 (en) 2015-11-06 2020-11-17 S.I.P.A. Societa' Industrializzazione Progettazione E Automazione S.P.A. Process to coat an injection mould
ITUB20155185A1 (it) * 2015-11-06 2017-05-06 Sipa Progettazione Automaz Metodo di rivestimento di stampo di iniezione per preforme
KR20180097537A (ko) * 2015-11-06 2018-08-31 에스.아이.피.에이. 소시에타’ 인더스트리아리자지오네 프로게타지오네 이 오토마지오네 에스.피.에이. 사출 금형을 코팅하는 방법
US11529758B2 (en) 2018-03-30 2022-12-20 Nissei Asb Machine Co., Ltd. Blow molding method, blow molding mold, and blow molding apparatus
WO2020262595A1 (fr) * 2019-06-28 2020-12-30 日精エー・エス・ビー機械株式会社 Appareil de production d'un article moulé en résine, procédé de production d'un article moulé en résine, et article moulé en résine
JPWO2020262595A1 (fr) * 2019-06-28 2020-12-30
US12290970B2 (en) 2019-06-28 2025-05-06 Nissei Asb Machine Co., Ltd. Apparatus for producing resin molded article, method for producing resin molded article, and resin molded article
JP7784301B2 (ja) 2019-06-28 2025-12-11 日精エー・エス・ビー機械株式会社 二層式のプリフォームの製造装置、および二層式のプリフォームの製造方法
JPWO2022118840A1 (fr) * 2020-12-01 2022-06-09
JP7586927B2 (ja) 2020-12-01 2024-11-19 日精エー・エス・ビー機械株式会社 剥離容器の製造方法および製造装置
CN114986790A (zh) * 2022-04-26 2022-09-02 东莞市信联兴电子有限公司 颈挂耳机软质胶注压模具及颈挂耳机软质胶包胶方法
CN116039007A (zh) * 2023-01-19 2023-05-02 浙江宏振机械模具集团有限公司 一种散热效果好的多层瓶坯用注塑装置

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CA2683614A1 (fr) 2008-10-23
EP2159031A4 (fr) 2011-08-24
EP2511064B1 (fr) 2016-01-13
CN102922664B (zh) 2015-03-18
CN101790447A (zh) 2010-07-28
WO2008125709A1 (fr) 2008-10-23
EP2159031A1 (fr) 2010-03-03
WO2008125698A1 (fr) 2008-10-23
US20120328814A1 (en) 2012-12-27
EP2159031B1 (fr) 2013-02-13
EP2511064A1 (fr) 2012-10-17
CN102922664A (zh) 2013-02-13
US8551592B2 (en) 2013-10-08

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