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
  • B29C49/42—Component parts, details or accessories; Auxiliary operations
  • B29C49/64—Heating or cooling preforms, parisons or blown articles
  • B29C49/6409—Thermal conditioning of preforms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/34—Feeding the material to the mould or the compression means
• • 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
  • B29B11/12—Compression 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
  • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
  • B29C49/0685—Compression blow-moulding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/08—Biaxial stretching during blow-moulding
  • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
  • B29C49/12—Stretching rods
• • 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
• • 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
  • B29C49/6472—Heating or cooling preforms, parisons or blown articles in several stages
• • 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
  • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
  • B29C71/02—Thermal after-treatment
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/34—Feeding the material to the mould or the compression means
  • B29C2043/3466—Feeding the material to the mould or the compression means using rotating supports, e.g. turntables or drums
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
  • B29C2043/3676—Moulds for making articles of definite length, i.e. discrete articles moulds mounted on rotating supporting constuctions
  • B29C2043/3689—Moulds for making articles of definite length, i.e. discrete articles moulds mounted on rotating supporting constuctions on a support table, e.g. flat disk-like tables having moulds on the periphery
• • 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
  • B29C2949/3024—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
  • B29C2949/3024—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
  • B29C2949/3028—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components having three 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
  • B29C2949/3056—Preforms or parisons made of several components having components being compression moulded
• • 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
  • B29C2949/3056—Preforms or parisons made of several components having components being compression moulded
  • B29C2949/3058—Preforms or parisons made of several components having components being compression moulded having two or more components being compression moulded
• • 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
  • B29C2949/3056—Preforms or parisons made of several components having components being compression moulded
  • B29C2949/3058—Preforms or parisons made of several components having components being compression moulded having two or more components being compression moulded
  • B29C2949/306—Preforms or parisons made of several components having components being compression moulded having two or more components being compression moulded having three or more components being compression moulded
• • 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
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2001/00—Articles provided with screw threads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/712—Containers; Packaging elements or accessories, Packages
• • 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
  • Y10T428/31—Surface property or characteristic of web, sheet or block
  • Y10T428/315—Surface modified glass [e.g., tempered, strengthened, etc.]
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31935—Ester, halide or nitrile of addition polymer

Definitions

• the present invention relates to a method and an apparatus for compression molding and stretch-opening molding for producing a synthetic resin container.
• the present invention relates to a method for compressing and molding a melt of a synthetic resin by a compression molding machine to form a preform.
• the present invention relates to a method and apparatus for producing a synthetic resin container by subjecting a specific heat treatment to a continuous heat treatment, and then continuously performing stretch blow molding with a stretch blow molding machine.
• Plastic containers are commonly used in everyday life as containers for beverages and food because of their light weight, economy, excellent physical properties and adaptability to environmental issues.
• containers molded from polyethylene terephthalate (PET) are in very high demand as containers for drinking water and favorite drinks due to their excellent mechanical properties and transparency, and recently, as small containers for portable use. Is widely used by consumers as a heating container for beverages.
• Synthetic resin containers such as polyethylene terephthalate (PET), which are important as containers for drinking water and food in daily life, are generally preforms (preformed bottomed cylindrical molding materials). It is efficiently manufactured by the stretch blow molding method (simply called stretch molding or blow molding) in which a fluid is blown into a molding die to expand and mold.
• stretch blow molding the stretch blow molding method
• the molding of preforms and the production of containers as molding materials for plastic containers have been mainly carried out in multi-cavity molds by the injection molding method.
• the preform was molded into a product container by stretch blow molding.
• the preform was cooled to or near room temperature or allowed to cool to room temperature, and then the entire preform or body was reheated.
• a compression molding machine has been proposed as a molding device that can be made smaller and can be molded at lower temperatures at a lower price than an injection molding device.
• a rotary compression molding machine rotary movable compression molding machine
• a mold is attached to a rotating disk
• Japanese Patent Application Laid-Open No. 60-2455517 See claim 1
• a preform molding method using a rotary compression molding machine a molding method using a material supply by an extrusion method and a molding method by using a rotary compression molding machine has been developed (Japanese Patent Application Laid-Open No. 2000-257720). (See Claim 1 and Fig. 1), the use of rotary compression molding machines has dramatically improved production efficiency.
• extrusion compression molding has been used in preform production. Is most promising.
• the preform reheating device before stretch blow can be used. This eliminates the need for heat treatment and can save the energy required for heating the preform. Furthermore, since the compression molding machine and the stretch blow molding machine are independent of each other, by setting the number of molding dies individually according to the molding speed, high productivity with excellent consistency of the molding speed can be realized. However, while having such advantages, preform performance changes due to changes in preform temperature, or stretch blow moldability changes due to the temperature difference between the preform surface and the inside due to the thickness of the preform.
• the preform molding method (or molding equipment) is an extremely excellent molding method in terms of economics and production efficiency. Therefore, the present inventors have commercialized a new molding method that continuously combines this preform molding method with stretch blow molding, and have developed a continuous system from compression molding to stretch blow molding. The idea was to realize the nature.
• the present inventors recognized that the above problem was deeply related to the thermal treatment of the preform,
• the invention of the present application can be found based on a specific thermal treatment of the preform after compression molding, and the invention of the present application was created. It led to.
• a new molding method that continuously combines such a preform molding method with stretch blow molding, and a specific thermal treatment of the preform after compression molding. This combination is a notable concept.
• the present inventors when examining the thermal treatment of the preform, do not perform the heat treatment which is usually conceived for the compression-molded preform, but perform the soaking treatment of the preform, that is, the uniform treatment.
• Heat treatment (especially in the body of the preform) to homogenize the heat history for each successively formed preform, or to homogenize the heat history for each part of the preform, I was able to find new tools to be evaluated as unique ideas.
• the soaking treatment is to place each preform in a certain thermal atmosphere (perform thermal treatment in a thermal atmosphere) to make the preform's thermal properties such as retained heat uniform.
• each preform after compression molding has a constant heat and is sent to the stretch blow molding process, so that uniform blow molding can be realized and synthetic resin containers with certain properties can be continuously produced.
• the temperature of each part (body, bottom, etc.) of each preform is higher immediately after compression molding, but the intermediate layer is higher than the inner and outer layers, but each preform is placed in a constant heat atmosphere.
• the temperature in the thickness direction of the preform can be made uniform before the time to stretch blow molding, and a container having a uniform layer can be formed.
• the preform in addition to the soaking treatment, if necessary, the preform may be subjected to a partial heating treatment and / or a partial cooling treatment as another requirement, and the preform is partially heated. It is also possible to add (or fine-tune) the preform's thermal conditions (thermal properties) according to the drawing pro- cess conditions by applying supplementary heat treatment by cooling to Z or Z or cooling.
• a rotary movable equipped with a plurality of holding mechanisms for holding and transporting a fixed amount of drops and supplying the same to a molding die of a compression molding machine.
• a rotary molding machine in which a compression molding machine uses a rotary movable die having a plurality of male and female molding dies, and a preform soaking mechanism treats a plurality of preforms.
• This is a rotary stretching pro molding machine in which a stretching pro molding machine sequentially stretch blow-molds a plurality of preforms, and features a continuous molding system in which these molding units are continuous. It is also what to say.
• the method of combining compression molding of preforms with stretch blow molding to industrialize compression stretching blow molding has been industrialized, and as a continuous system from compression molding to stretching professional molding, excellent preform high productivity has been achieved.
• a new thermal technique that reduces the preform's performance due to preform temperature changes or the temperature difference between the preform surface and the interior due to the thickness of the preform.
• stretch blow molding in the specification and the like of the present application is synonymous with ordinary stretch molding or blow molding.
• the invention of the present application has been described in an overview with respect to the background of the invention of the present application and the basic configuration and features of the invention of the present application.
• the invention of the present application is composed of the following invention unit group.
• the invention of [1], [2] and [4] is a basic invention, and the other inventions embody or implement the basic invention. It is to be implemented. (Note that the entire invention group is collectively referred to as "the present invention.")
• a compression molding machine is used to compression-mold a drop, which is a synthetic resin molten agglomerate, to form a preform, and then to continuously stretch-mold the preform using a stretch blow molding machine to produce a synthetic resin container. Method.
• an apparatus for producing a synthetic resin container by compression-molding a preform by a compression molding machine and then continuously performing stretch forming by a stretch blow molding machine, a synthetic resin extruded from an extrusion opening of an extruding means.
• the cutting means, supply means, compression molding machine, preform removal tool, preform soaking treatment mechanism, stretch blow molding machine, and product container removal tool of the molten agglomerate are configured as a continuous system.
• a partial heating and / or partial cooling process or a partial heating and / or a Z or partial cooling mechanism is further added to the preform soaking process or the soaking mechanism according to the body temperature of the preform.
• the drop supply method is a means for holding, transporting, and supplying to a molding die of a compression molding machine a fixed amount of drops obtained by cutting a synthetic resin in a molten state extruded from an extrusion opening.
• This is a rotary type movable molding means having a plurality of transporting methods and drop holding / transporting mechanisms, and a rotary one-compression molding machine in which a compression molding machine uses a rotary movable type having a plurality of male and female molding dies.
• the preform soaking treatment mechanism is a rotary processing mechanism that processes a plurality of preforms
• the stretch blow molding machine is a rotary stretch blow molding machine that sequentially stretch blow molds a plurality of preforms.
• FIG. 1 is a schematic plan view specifically illustrating a preferred embodiment of a molding system configured according to the present invention.
• FIG. 2 is a partial plan view illustrating a heat equalizer in the present invention.
• FIG. 3 is a schematic view exemplifying the holding and conveying of a molten resin drop and the injection into a compression mold according to the present invention.
• the present invention relates to a compression stretch blow molding method and apparatus for producing a synthetic resin container, in which a preform is compression molded by a compression molding machine, a specific thermal treatment of the preform is performed, and then a stretch blow molding machine is used.
• the present invention relates to a method and an apparatus for producing a synthetic resin container by stretch blow molding.
• the molding system of the basic configuration of the present invention has, as its skeleton, firstly a compression molding step, a preform soaking step, and a stretching opening one molding step, and secondly, a compression molding step.
• the preform soaking process includes a preform partial heating and / or Z or partial cooling treatment process, and a stretching opening one forming process.
• the molding system having this basic configuration is illustrated as a schematic diagram of the molding process in the schematic diagram of FIG.
• any moldable thermoplastic resin can be used as a raw material resin for forming the preform of the present invention.
• resins include thermoplastic polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN); copolymerized polyesters mainly composed of these ester units; or blends thereof.
• ABS resin Atari-Rubutadiene-styrene copolymer
• polyacetal resin nylon 6, nylon 66, copolymers of these nylons
• acrylic resins such as polymethyl methacrylate , Isotactic 'polypropylene, polystyrene, low-, medium-, or high-density polyethylene, ethylene-propylene copolymer, ethylene-butene-11 copolymer, styrene-butadiene thermoplastic elastomer, etc. so That.
• Various additives such as a coloring agent, an ultraviolet absorber, a release agent, a lubricant, and a nucleating agent can be added to these resins within a range that does not impair the quality of the product.
• the preform of the present invention may be composed of a single layer (one layer) of a thermoplastic resin layer, or may be composed of two or more thermoplastic resin layers. Monkey.
• the preform of the present invention can have an intermediate layer laminated between an inner layer and an outer layer composed of two or more thermoplastic resin layers, wherein the intermediate layer is an oxygen barrier layer or an oxygen absorbing layer. You can also.
• the compression-molded preform is subjected to a soaking treatment (uniform thermal treatment, particularly at the body of the preform). Therefore, it is important to make the thermal history uniform for each preform, or for each part of the preform.
• the soaking treatment includes a heating treatment or a cooling treatment or a combination thereof, and further includes leaving at room temperature instead of forcibly heating or cooling.
• the preform after compression molding is hugged by the core (male type), and the outer periphery of the nozzle part (screw part) of the container is Pull out the core while holding it with the nozzle mold split mold (female mold).
• the surface temperature of the nozzle portion at this time is preferably 80 ° C or less (more preferably 60 ° C or less) when the synthetic resin is PET-based polyester, and when the temperature exceeds 80 ° C, the resin is softened. The nozzle part is deformed.
• the surface temperature of the preform body is lower than 120 ° C (more preferably, lower than 80 ° C), it can be removed without deformation, but the temperature inside the polyform is lower. Since the temperature is higher than the surface, if left as it is, the surface temperature rises, and the preform is whitened, which is not preferable.
• the temperature of the preform body at the time of removal of the preform increases or decreases depending on the mold temperature and the cooling time during compression molding.
• the stretch blow molding can be performed as it is by equalizing the temperature of the drum body to 80 to 120 ° C.
• the temperature at the time of preform removal is high (for example, the body surface temperature is 60 ° C to 120 ° C), immediately cool the entire preform with cold air after removing the preform. By forcibly cooling a part of the preform body, the preform body is soaked to 80 to 120 ° C.
• the temperature of the preform body at the time of removing the preform is appropriate (for example, the body surface temperature is 50 ° C to 90 ° C)
• the temperature of the preform is removed from room temperature immediately after removal of the preform.
• the body is soaked to 80 to 12 ° C by heating or cooling a part of the preform body as needed in an atmosphere near ° C.
• the temperature of the preform body at the time of removing the preform is low (for example, the body surface temperature is between room temperature and 60 ° C), the temperature in the atmosphere around 100 ° C from room temperature after the preform is removed. If necessary, the entire preform body is heated by hot air and Z or infrared heaters, etc., and if necessary, a part of the preform body is heated.
• the preform temperature is determined by the molding conditions of the subsequent stretch blow molding, so that the preform is soaked after the preform is taken out according to the specific prescription example of the above soaking.
• This preheating method is used as a preform preheating device (preheating device), which is a major component of the molding system of the present invention.
• a specific example of a preform soaking device is shown in a partial plan view.
• the compression-molded preform 21 was partially removed.
• Each of the preforms has been subjected to a partial soaking process by the heating device 23, and is transported along the preform conveying path 22 to be sent to a stretch molding machine.
• the preforms after compression molding have constant thermal conditions such as retained heat and are sent to the stretch blow molding process.
• Containers can be produced continuously.
• each part (body, bottom, etc.) of each preform immediately after compression molding is such that the intermediate layer is higher than the inner and outer layers, but each preform is kept in a certain thermal atmosphere.
• the temperature in the thickness direction of the preform can be made uniform during the time required for the stretching process to be performed, and a container having a uniform layer can be formed.
• the partial heating treatment and / or the partial cooling treatment is given to the preform as another requirement, and based on experimental data of the preform, if necessary.
• the preform may be partially heated and partially cooled or subjected to a supplementary heat treatment, and the heat condition of the preform may be corrected (fine-tuned) according to one condition of the stretching process. In monkey.
• the partial heating or cooling of the preform is performed by a partial heating device and a Z or partial cooling device, and a usual heating or cooling device such as an infrared heater (or cold air) is used.
• a partial heating device (partial heating mechanism) 23 that performs a partial heating process while performing a soaking process on a preform is illustrated.
• a rotary movable mold having a plurality of holding mechanisms for holding and transporting a fixed amount of drops and supplying the same to a molding die of a compression molding machine
• a rotary compression molding machine that uses a rotary movable mold with multiple molding dies consisting of male and female molds, using a drop supply, and a preform soaking process mechanism that processes multiple preforms. It employs a continuous molding system in which the stretch blow molding machine is a rotary stretch blow molding machine that sequentially stretch blow molds a plurality of preforms.
• This continuous molding system is illustrated in the schematic diagram of FIG. 1, as described in (1) the basic configuration of the present invention.
• a step of heating and crystallizing the mouth and neck of the container is preferably added, if necessary.
• This process is usually used in the stretch forming of synthetic resin containers represented by polyethylene terephthalate, and only the mouth part of the preform is heat-treated to whiten and crystallize, thereby reducing the strength of the mouth and neck. Used to enhance.
• This crystallization step may be performed before or after the stretch blow molding.
• the molten resin supply mechanism includes an extrusion die head 31 of an extruder and a molten resin cutting and conveying device 32.
• the molten resin cutting and conveying device includes an extrusion die head.
• the compression molding apparatus is provided with a number of molding dies 36 on a rotating base, and the dies are composed of a female die 37 and a male die 38 arranged coaxially and freely openable and closable in the vertical direction.
• the male mold has a cavity that matches the outer shape of the preform.
• the male mold can be raised and lowered by a hydraulic mechanism, and a driven mold 39 is attached to the upper part of the male mold to form the top surface of the preform.
• the drop conveyed to the compression molding device by the molten resin cutting and conveying device is dropped into the female mold cavity when the holding tool of the holding and conveying mechanism releases the drop holding at the upper part of the female mold.
• the mold is clamped in the cavity, the male mold and the driven mold descend, and the molten resin fills the preform molding space defined by the male and female molds, and the preform is molded after being clamped at a fixed temperature for a fixed time. Is done.
• the mold After the mold cools, the mold is opened and the male mold rises, and the preform is removed from the cavity with it.
• the formed preform is taken out of the compression molding device by the preform removal device and transferred to the soaking device, taking into account the thermal state of the preform immediately after compression molding and the stretching process conditions in the next process. Then, it is subjected to the soaking process and the partial heating / cooling process described in 2 ⁇ 2 and 2 ⁇ 3 as needed.
• the preform which has been adjusted to a temperature (thermal state) suitable for stretch blow molding through a soaking process or a partial heating / cooling process, is sent to a rotary stretch blow molding machine, where it is heated by pressurized air or the like.
• Blow molding by biaxial stretching or further two-stage blow by blowing in pressurized fluid
• the molded product containers are taken out by the product take-out device, collected and sent to the product inspection process.
• the rotary trajectory of the rotary movable drop supply having a plurality of holding mechanisms and the rotary trajectory of the rotary movable die having a plurality of dies in the rotary compression molding machine have a trajectory where the trajectory overlaps.
• the mode of dropping the drop in the trajectory is preferable because the drop is accurately inserted into the female recess.
• the molding was performed using the molding system apparatus shown in FIGS. 1 to 3 exemplifying a preferred embodiment of the present invention.
• the synthetic resin (polyethylene terephthalate) heated and melted in the extruder is continuously extruded from the opening of the die head fixed to the tip of the extruder, and the molten resin is cut by a cutting tool to form a cylindrical drop. (Cut molten mass) was obtained.
• This drop is nipped and conveyed by the fixtures and presses of a large number of holding mechanisms provided on the rotary movable drop supply, and the multiple molding dies provided on the rotary compression molding machine are conveyed.
• a preform was obtained by inserting it into a female mold and compression-molding in cooperation with the female mold and the male mold.
• the formed preform was discharged by the unloader and immediately transferred to the preform soaking unit. At this time, the surface temperature of the preform was 60 ° C at the nozzle portion and 100 ° C at the body portion.
• the entire preform was cooled for 30 seconds with cold air at 15 ° C, and the preform body was soaked at 10 ° C, and then rotated biaxially.
• the surface temperature of the preform taken out of the compression molding machine was 55 ° C at the nozzle portion and 80 ° C at the body portion.
• the temperature was kept for 30 seconds in an atmosphere at 80 ° C. in a soaking apparatus, and then transferred to a rotary biaxial stretching pro-molding machine, where biaxial stretching pro-molding was performed to obtain a stretching bottle.
• the surface temperature of the preform taken out of the compression molding machine was 50 ° C at the nozzle portion and 60 ° C at the body portion.
• the temperature was kept for 30 seconds in an atmosphere of 100 ° C. in a heat equalizer, and then transferred to a rotary biaxial stretch blow molding machine, where it was biaxially stretched and formed to obtain a stretched bottle.
• Example 11 the heat treatment was not performed, and the other conditions were the same as in Example 11.
• Example 12 the soaking treatment was not performed, and the other conditions were the same as in Example 2.
• Example 13 the soaking treatment was not performed, and the other conditions were the same as in Example 13.
• the bottle was successfully molded as desired and quality
• Comparative Example 11 the surface temperature of the preform body removed from the compression molding machine rose to 160 ° C., and the entire body turned white.
• Comparative Examples 12 and 13 since the temperature of a part or the whole of the preform body was low, normal blow molding could not be performed as desired. From the results of each of the above Examples and Comparative Examples, the effectiveness and necessity of the requirements for the soaking treatment in the present invention are understood. Industrial applicability
• the method of compressing stretch blow molding by combining the preform molding method with stretch blow molding is industrialized, and as a continuous system from compression molding to stretch professional molding, excellent preform productivity is improved. It can be realized, and the new thermal processing technology can be used to change the performance of the preform due to the temperature change of the preform, or the elongation blow due to the temperature difference between the surface and the inside of the preform due to the thickness of the preform. Problems such as fluctuations in formability could be solved, and as a result, certain high-quality product containers could be obtained. Also, the compression molding machine and the extension blow molding machine are continuous but independent of each other, so that an optimal molding time can be selected and set in each molding.
• each preform after compression molding has a constant heat retention and is sent to the stretch blow molding process.
• Containers can be produced continuously.
• the temperature of each part (body, bottom, etc.) of each preform immediately after compression molding is higher in the intermediate layer than in the inner and outer layers.
• the temperature in the thickness direction of the preform can be made uniform in the time required for stretch blow molding, and a container having a uniform layer can be formed.
• the temperature of the preform is stabilized and the reproducibility of molding is good.
• the preform in addition to the soaking treatment, it is another requirement that the preform is subjected to a partial heating treatment and a heat treatment or a partial cooling treatment, and the preform is partially heated and / or cooled. Supplementary heat treatment can be applied to correct (fine-tune) the preform thermal conditions according to the stretch blow conditions.
• the present invention can be said to be a very excellent molding method in terms of economy and production efficiency, and has realized the industrialization of a new molding method that continuously combines compression molding and stretch blow molding.
• it is useful in the plastic molding and plastic packaging industries and has broad industrial applicability.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Containers Having Bodies Formed In One Piece (AREA)

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• 2003
  • 2003-10-17 JP JP2003358577A patent/JP4356066B2/ja not_active Expired - Fee Related
• 2004
  • 2004-10-08 AU AU2004282049A patent/AU2004282049B2/en not_active Ceased
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