WO2020017505A1 - ブロー成形用金型、これを用いた樹脂製容器の製造方法および樹脂製の容器 - Google Patents
ブロー成形用金型、これを用いた樹脂製容器の製造方法および樹脂製の容器 Download PDFInfo
- Publication number
- WO2020017505A1 WO2020017505A1 PCT/JP2019/027947 JP2019027947W WO2020017505A1 WO 2020017505 A1 WO2020017505 A1 WO 2020017505A1 JP 2019027947 W JP2019027947 W JP 2019027947W WO 2020017505 A1 WO2020017505 A1 WO 2020017505A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold
- container
- preform
- blow molding
- neck
- Prior art date
Links
- 238000000071 blow moulding Methods 0.000 title claims abstract description 81
- 239000011347 resin Substances 0.000 title claims description 23
- 229920005989 resin Polymers 0.000 title claims description 23
- 238000004519 manufacturing process Methods 0.000 title description 14
- 238000000034 method Methods 0.000 title description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 68
- 238000005452 bending Methods 0.000 claims description 25
- 238000007664 blowing Methods 0.000 claims description 6
- 210000003739 neck Anatomy 0.000 description 75
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 210000000078 claw Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 2
- 229920000747 poly(lactic acid) Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000004626 polylactic acid Substances 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- FDSYTWVNUJTPMA-UHFFFAOYSA-N 2-[3,9-bis(carboxymethyl)-3,6,9,15-tetrazabicyclo[9.3.1]pentadeca-1(15),11,13-trien-6-yl]acetic acid Chemical compound C1N(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC2=CC=CC1=N2 FDSYTWVNUJTPMA-UHFFFAOYSA-N 0.000 description 1
- MMINFSMURORWKH-UHFFFAOYSA-N 3,6-dioxabicyclo[6.2.2]dodeca-1(10),8,11-triene-2,7-dione Chemical compound O=C1OCCOC(=O)C2=CC=C1C=C2 MMINFSMURORWKH-UHFFFAOYSA-N 0.000 description 1
- 229920001634 Copolyester Polymers 0.000 description 1
- 229920000491 Polyphenylsulfone Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000704 biodegradable plastic Polymers 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/14—Clamps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/023—Neck construction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/0261—Bottom construction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C2049/4856—Mounting, exchanging or centering moulds or parts thereof
- B29C2049/4858—Exchanging mould parts, e.g. for changing the mould size or geometry for making different products in the same mould
- B29C2049/4861—Neck portions of bottle producing moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
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- B29C2049/4879—Moulds characterised by mould configurations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C2049/4879—Moulds characterised by mould configurations
- B29C2049/4889—Mould halves consisting of an independent neck, main and bottom part
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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
- 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
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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
- B29C2949/00—Indexing scheme relating to blow-moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
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- 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
-
- 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
- B29C2949/0781—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom characterised by the sprue, i.e. injection mark
-
- 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
- B29C49/061—Injection blow-moulding with parison holding means displaceable between injection and blow stations
- B29C49/062—Injection blow-moulding with parison holding means displaceable between injection and blow stations following an arcuate path, e.g. rotary or oscillating-type
-
- 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
- B29C49/56—Opening, closing or clamping means
- B29C49/5611—Tilting movement, e.g. changing angle of the mould parts towards the vertical direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
Definitions
- the present invention relates to a mold for blow molding, a method for manufacturing a resin container using the same, and a resin container.
- Patent Documents 1, 2 and 3 disclose stretch blow molding methods.
- Patent Literature 4 discloses a direct blow molding method.
- a container manufactured by blow molding there is a container which is bent at a neck whose central axis is inclined with respect to the central axis of a body.
- a neck having a small inclination angle can also be manufactured by stretch blow molding by using the inclined stretching mechanisms of Patent Documents 1, 2 and 3.
- a container for example, 60 ° or more
- such a container is manufactured by direct blow molding of Patent Document 4.
- containers that can be manufactured by direct blow molding are generally inferior in aesthetic appearance to those of stretch blow molding.
- the object of the present invention is to provide a blow molding die capable of manufacturing a bent container having a large inclination angle by stretch blow molding, a method for manufacturing a resin container using the same, and a resin container.
- the blow molding die of the present invention capable of solving the above problems, A bottom mold, a neck mold, a clamping mechanism, and a rotation mechanism, a blow molding mold including:
- the clamping mechanism is provided independently of the bottom mold, and is configured to be able to grip a protrusion provided independently of the gate at the bottom of the preform,
- the rotation mechanism is configured to be able to rotate the bottom mold in a state in which the holding part is gripped by the holding mechanism with respect to a neck part of the preform in a stationary state held by the neck mold. ing.
- a neck bending container having a large inclination angle can be manufactured by stretch blow molding.
- the method for producing the resin container of the present invention In the state where the split mold of the blow molding die is open, the protrusion provided independently of the gate portion at the bottom of the preform housed in the blow molding die is provided with the blow molding die.
- a gripping step of gripping with a gripping mechanism provided independently on the bottom mold A bending step of bending the preform by rotating the bottom mold gripping the projection with respect to a neck of the preform in a stationary state held by a neck mold; and A blowing step of stretching the preform by a pressure medium, Having.
- a neck-bent container having a large inclination angle can be manufactured by a method other than the direct blow molding.
- the method for producing a resin container of the present invention further includes, before the clamping step, a preliminary stretching step of stretching the bottom of the preform by the stretching rod toward the bottom mold.
- a neck bending container having a large inclination angle can be manufactured by stretch blow molding.
- the resin container of the present invention A resin container composed of a neck portion having an opening, a body portion formed so as to be continuous with the neck portion and defining a side wall portion, and a bottom portion formed so as to be continuous with the body portion, An axis passing through the center of the opening and orthogonal to an opening surface formed by the opening and an axis extending in a vertical direction of the container, an inclination angle formed by 50 ° or more and 80 ° or less,
- the direction extending in the horizontal diameter direction of the opening is the width direction of the container, and the direction in which the axis perpendicular to the opening surface formed by the opening extends is the depth direction of the container,
- the length in the width direction and the length in the depth direction of the horizontal cross section of the trunk are different, This is a container manufactured by the stretch blow molding method.
- the bottom has an overhang projecting outward from an outer surface of the bottom.
- the body includes an upper body provided with an inclined surface that is inclined along a direction perpendicular to an axis perpendicular to an opening surface formed by the opening, and a lower body that extends along the vertical direction in connection with the upper body.
- the horizontal cross-sectional shape of the upper body and the lower body is polygonal, It is preferable that the number of corners of the polygonal horizontal section of the upper body is smaller than the number of corners of the polygonal horizontal section of the lower body.
- a blow molding die capable of producing a neck bending container having a large inclination angle by stretch blow molding, a method for producing a resin container using the same, and a resin container.
- FIG. 1 It is a figure which shows the neck bending container with a large inclination angle.
- (A) shows the state of the left side of the container, and (b) shows the state of the front of the container.
- (A) is a front view of the preform,
- (b) is a left side view of the preform,
- (c) is a partially enlarged view of the front view of the preform, and
- (d) is a partially enlarged view of the left side view of the preform. Is shown.
- (A) is a front view of the mold, and (b) is a left side view of the mold.
- FIG. 1 It is a figure showing a pinching mechanism. It is a figure showing a situation of blow molding.
- (A) is a figure which shows the mode that the preform was accommodated in the metal mold
- (A) shows the state of the container when viewed from the opening side
- (b) shows the state of the front of the container
- (c) shows the state of the right side of the container
- (d) shows the E- of the container.
- the state of E section is shown
- (e) shows the state of FF section of the container.
- FIG. 1A shows a left side view of the container 10
- FIG. 1B shows a front view of the container 10.
- the container 10 includes a neck portion 12 having an opening 11, a body portion 13 formed so as to be continuous with the neck portion 12 and defining a side wall portion of the container 10, and a bottom portion 14 formed so as to be continuous with the body portion 13. It is a resin container to be used.
- the bottom portion 14 includes an outer edge portion which is formed in a horizontal plane and serves as a grounding surface, and an upper bottom portion which is depressed toward the body portion 13 to form a concave portion.
- an overhang portion (overhang mark portion) 215 is provided within the range of the depth of the recess of the bottom portion 14 (depth of the upper bottom portion).
- an angle formed by an axis A passing through the center of the opening 11 of the neck portion 12 and orthogonal to the opening surface and an axis B extending in the vertical direction of the container 10 is referred to as a tilt angle X.
- the inclination angle X of the container 10 of this example is large, and is approximately 60 °.
- the upper part when the body part 13 is bisected in the vertical direction has a substantially triangular shape when viewed from the front (FIG. 1B).
- a part of the trunk 13 connected to the neck 12 at the upper position in the vertical direction is curved, and a part of the trunk 13 connected to the neck 12 at the lower position in the vertical direction is an open surface.
- the horizontal cross-sectional shape of the body 13 may be any of a flat shape, a substantially elliptical shape, a substantially perfect circle shape, or a substantially polygonal shape (in the case of the container 10 in FIG. 1, the shape is flat). ).
- the height of the container 10 of this example is approximately 13 cm, the width is approximately 3 cm, and the depth is approximately 4 cm.
- the width is the length of the horizontal cross section of the body portion 13 or the bottom portion 14 in the short axis direction (the short diameter direction)
- the depth is the length of the horizontal cross section of the body portion 13 or the bottom portion 14. The length in the major axis direction (the minor axis direction) is shown.
- FIG. 2 is a block diagram of the blow molding apparatus 100.
- the blow molding apparatus 100 includes an injection molding unit 110 for manufacturing the preform 20 and a temperature control unit 120 for adjusting the temperature of the manufactured preform 20.
- An injection device 112 for supplying a resin material as a raw material is connected to the injection molding section 110.
- the synthetic resin used as a raw material is a thermoplastic resin, and can be appropriately selected according to the application. Examples of the synthetic resin include PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PCTA (polycyclohexane dimethylene terephthalate), Tritan (tritan: copolyester), PP (polypropylene), PE (polyethylene), and PC (polycarbonate).
- the blow molding apparatus 100 includes a blow molding unit 130 for blowing the preform 20 to manufacture the container 10 and an extraction unit 140 for extracting the manufactured container 10.
- the injection molding unit 110, the temperature adjustment unit 120, the blow molding unit 130, and the take-out unit 140 are provided at positions rotated by a predetermined angle (90 degrees in the present embodiment) about the conveyance unit 150.
- the conveying means 150 is composed of a rotating plate or the like, and as shown in FIGS. 4 and 6 described below, the preform 20 or the preform 20 in a state in which the neck portions 12 and 22 are supported by the neck mold 152 attached to the rotating plate.
- the container 10 is configured to be conveyed to each unit as the rotating plate rotates.
- the injection molding section 110 shown in FIG. 2 includes an injection cavity mold, an injection core mold, a neck mold, and the like, not shown. By pouring a resin material from the injection device 112 into a preform-shaped space formed by clamping these molds, the bottomed preform 20 is manufactured.
- FIG. 3A is a front view of the preform 20
- FIG. 3B is a right side view of the preform 20
- FIG. 3C is a partially enlarged view of the front view of the preform 20
- FIG. (D) is a partially enlarged view of the right side view of the preform 20.
- the preform 20 includes a neck portion 22 having an opening 21, a body portion 23 formed so as to be continuous with the neck portion 22 and defining a side wall portion of the preform 20, and a bottom portion 24 formed so as to be continuous with the body portion 23. It is configured.
- An overhang 25 is provided at the center of the bottom 24.
- the overhang portion 25 includes a gate portion 26 that is closer to the resin injection gate at the time of preform molding, and a protrusion portion 27 that is formed above the gate portion 26 in the vertical direction and continues to the lower end of the preform 20. ing.
- the protruding portion 27 is formed in a flat shape, is formed to have a larger diameter (wider) than the gate portion 26 in a front view (FIGS. 3A and 3C), and in a side view. It is formed to have the same width as the gate portion 26 (FIG. 3B and FIG. 3D). That is, the left-right direction of the protrusion 27 (the left-right direction on the paper surface of FIGS. 3A and 3B.
- the protrusion 27 In a state where the preform 20 is supported by the neck mold 152, the protrusion 27 The length in the wide direction (which looks wider than that) is longer than the length of the gate portion 26 in the left-right direction on the paper surface of FIGS. 3A and 3B.
- the front-rear direction of the protrusion 27 (the left-right direction on the paper surface of FIGS. 3B and 3D.
- the width of the protrusion 27 and the gate portion 26 Of the gate portion 26 in the front-back direction is the same as the length of the gate portion 26 in the front-back direction.
- the temperature control unit 120 is configured to adjust the temperature of the preform 20 manufactured by the injection molding unit 110 to a temperature suitable for final blowing.
- the blow molding unit 130 is configured to perform blow molding on the preform 20 whose temperature has been adjusted by the temperature adjustment unit 120 to manufacture the resin container 10.
- the blow molding section 130 includes a blow molding die 200 and a stretch rod 132.
- FIG. 4A is a front view of the mold 200
- FIG. 4B is a left side view of the mold 200.
- the mold 200 includes a pair of split dies (blow cavity split dies) 210, a bottom die 220, a pair of neck dies 152, a clamping mechanism 230, and a rotating mechanism 240.
- the split mold 210 is configured to be openable and closable in the left-right direction (opening / closing direction D) with reference to the parting surface C in a side view (FIG. 4B).
- the pair of right and left split dies 210 constitutes a space S that defines the body 13 of the container 10 in the closed state.
- the bottom mold 220 includes a first bottom mold member 221 that defines the bottom 14 of the container 10 and a second bottom mold member (housing block) 260 disposed below the first bottom mold member 221. Further, the holding mechanism 230 is provided in the bottom mold 220 so as to be housed therein (FIG. 4 (a) and FIG. 4 (b)).
- the first bottom mold member 221 accommodates at least a part of a clamping portion 232 (described later) of the clamping mechanism 230
- the second bottom mold member 260 includes at least a part of the opening / closing mechanism 234 (described later) of the clamping mechanism 230. Is accommodated.
- the second bottom mold member 260 is provided on the upper surface of a guided portion 244 described later.
- the bottom mold 220 and the guided portion 244 (described later) are configured to be integrally movable along the guide portion 242 (described later).
- the holding mechanism 230 includes a holding portion 232 configured to be able to grasp the protrusion 27 of the overhang 25 provided on the bottom 24 of the preform 20.
- the holding portion 232 is provided independently of the bottom die 220 (not directly provided on the bottom die 220 but separately).
- the holding portion 232 is configured to be openable and closable by a driving member (opening / closing mechanism 234) connected via a link mechanism below the bottom mold 220, and holds the protrusion 27 by being changed from an open state to a closed state.
- a claw portion 233 protruding inward of the holding portion 232 is provided at a distal end portion of the holding portion 232, and the claw portion 233 is configured to bite into the protrusion 27 in a state where the holding portion 232 is closed.
- the first bottom mold member 221 includes a first storage portion 236A.
- the second bottom mold member 260 includes a second storage portion 236B.
- the portion including the first storage portion 236A and the second storage portion 236B is defined as a storage portion 236 in this specification.
- the first housing 236A and the second housing 236B communicate with each other.
- the accommodation block 260 and the bottom mold 220 are provided with openings for guiding the projecting portion 25 of the preform 20 to the holding portion 232.
- the holding section 232 and the opening / closing mechanism 234 are covered by the housing section 236.
- the holding mechanism 230 is disposed in the storage section 236.
- the neck mold 152 is attached to the rotating plate as described above, and is configured to convey the preform 20 or the container 10 to each part with the rotation of the rotating plate while supporting the necks 12 and 22.
- the rotation mechanism 240 includes a guide portion 242 having a flat plate-shaped cam groove 243 and a movable block (not shown) fixed immediately below the housing portion 236 and disposed on the side of the bottom mold 220 and below the split mold 210. And a guided portion (cam follower) 244 connected thereto (FIG. 4A).
- the cam groove 243 of the guide portion 242 has at least a curved portion, and a straight portion is provided as necessary.
- the curved portion has one end in the vertical direction below the preform 20 transported from the temperature control unit 120 by the rotating plate.
- the guided portion 244 moves along the curved portion, the body 23 and the bottom 24 of the preform 20 rotate relative to the neck 22 by a predetermined angle (for example, 60 °) corresponding to the inclination angle X of the container 10. Is done.
- the neck 22 is supported by a neck or the like so as not to move.
- the rotation mechanism 240 moves the guided part 244 along the cam groove 243 of the guide part 242, thereby moving the bottom mold 220 through the moving block with respect to the position where the neck mold 152 is arranged during blow molding. It is configured to be able to rotate. That is, the rotation mechanism 240 can rotate the bottom mold 220 in a state where the projection 27 is grasped by the holding mechanism 230 with respect to the neck 22 of the preform 20 in a stationary state held by the neck mold 152. It is configured as follows.
- the rotation mechanism 240 is configured to be able to rotate the bottom mold 220 on a plane orthogonal to the opening and closing direction D of the split mold 210 of the mold 200.
- the rotation mechanism 240 is configured to be able to rotate the bottom mold 220 along the parting surface C of the split mold 210.
- the bottom mold 220 is bent (bent) from the first position corresponding to the central axis direction of the unbent (straight) body 23 of the preform 20.
- the rotation mechanism 240 may be referred to as a swing mechanism or a swing mechanism.
- the removal unit 140 is configured to open the neck 12 of the container 10 manufactured by the blow molding unit 130 from the neck mold 152 and remove the container 10.
- FIG. 6A is a view showing a state in which the preform 20 is accommodated in the mold 200 with the split mold 210 (not shown) opened
- FIG. 6B is a view showing the preform
- FIG. 7C is a diagram showing a state in which the protrusion 27 of FIG. 20 is gripped by the holding mechanism 230
- FIG. 6C is a diagram showing a state in which the preform 20 is bent.
- the blow molding process according to the present embodiment includes a clamping process in which the protrusion 27 of the preform 20 stored in the mold 200 is gripped by the clamping mechanism 230 of the mold 200 in a state where the split mold 210 of the mold 200 is open.
- the preform 20 supported by the neck mold 152 and adjusted to a temperature suitable for blow molding by the temperature adjusting unit 120 is conveyed to the blow molding unit 130 by the conveying means 150, and the preform 20 with the split mold 210 opened is opened. It is housed in the mold 200 (FIG. 6A).
- the stretching rod 132 at the standby position provided in the blow molding unit 130 is lowered, and the bottom 24 of the preform 20 is pressed from inside to stretch the preform 20 toward the bottom mold 220 (preliminary stretching step). ).
- the preform 20 is extended to the bottom mold 220, and the overhang 25 of the bottom 24 is accommodated in the bottom mold 220 and the opening of the accommodation section 236 (FIG. 6B).
- the protruding portion 27 of the accommodated overhang portion 25 is gripped by the holding mechanism 230, and the bottom mold 220 of the mold 200 and the bottom 24 of the preform 20 are connected (a holding step). Thereafter, the stretching rod 132 is raised to the standby position.
- the guided part 244 attached to the bottom die 220 is moved by the rotating mechanism 240 along the cam groove 243 of the guide part 242 in the diagonally upper left direction in FIG.
- the bottom mold 220 holding the projection 27 is rotated with respect to the neck 22 of the preform 20 in a stationary state held by the neck mold 152 (FIG. 6C).
- a part of the body 23 near the neck 22 of the preform 20 is bent (bending process).
- the split mold 210 is closed, and the bent preform 20 is accommodated in the space SS defining the outer shape of the container 10 including the neck mold 152, the split mold 210, and the bottom mold 220.
- a pressurized medium such as air is introduced into the preform 20, and the preform 20 is blown and stretched to form the container 10 (blow step).
- the split mold 210 is opened to open the container 10, and the container 10 is conveyed to the take-out unit 140 by the conveying means 150.
- a container having a small inclination angle of the neck can also be manufactured by stretch blow molding by using the inclined stretching mechanism disclosed in Patent Literature 1, Patent Literature 2, and Patent Literature 3.
- containers that can be manufactured by direct blow molding are generally inferior in aesthetic appearance to those of stretch blow molding.
- resin loss material
- a post-process of trimming the cut surface is essential even after blow molding, and it is difficult to manufacture a container having high surface gloss.
- the blow molding die 200 can be provided independently of the bottom die 220 and can grip the projection 27 provided independently of the gate 26 on the bottom 24 of the preform 20.
- the holding mechanism 230 configured as described above, and the bottom mold 220 in which the protrusion 27 is gripped by the holding mechanism 230 are rotated with respect to the neck 22 of the preform 20 in a stationary state held by the neck mold 152.
- a rotation mechanism 240 configured to be capable of According to the blow molding die 200 having the configuration, the neck bending container 10 having a large inclination angle can be manufactured by stretch blow molding. Thereby, it is not necessary to consider the problem in the above-mentioned direct blow molding, and it is possible to manufacture the neck bending container 10 having a large apex angle of the neck portion 12 having an excellent aesthetic appearance.
- the blow molding die 200 is configured such that the bottom die 220 is rotatable on a plane orthogonal to the opening / closing direction D of the split die 210 of the die 200 by the rotation mechanism 240. I have.
- the bottom die 220 is configured to be rotatable along the parting surface C of the split die 210.
- the split die 210 moves in comparison with the mode in which the bottom die 220 moves in the opening / closing direction D of the split die 210. Can be reduced, and space can be saved. Further, the thickness of the mold 200 can be reduced, which is advantageous in terms of thermal efficiency.
- the projection 27 provided on the bottom 24 of the preform 20 independently of the gate 26 is provided independently on the bottom 220 of the blow molding die 200.
- the preform 20 is gripped by the holding mechanism 230, and the bottom mold 220 gripping the projection 27 is rotated with respect to the neck 22 of the preform 20 in a stationary state held by the neck mold 152, and the preform 20 is moved. It has a bending step for bending.
- the neck bending container 10 having a large inclination angle can be manufactured by a method other than the direct blow molding. Thereby, it is not necessary to consider the above-mentioned problem in the direct blow molding, and it is possible to manufacture the neck bending container 10 having a large apex angle of the neck portion 12 which is excellent in aesthetic appearance.
- the blow molding method according to the above-described embodiment has a pre-stretching step of stretching the bottom 24 of the preform 20 toward the bottom mold 220 by the stretching rod 132.
- the neck bending container 10 having a large inclination angle can be manufactured by stretch blow molding.
- the protrusion 27 sandwiched by the sandwiching mechanism 230 is provided above the gate 26, and is increased in diameter to have a thickness in the width direction. Thereby, the holding of the projection 27 by the holding mechanism 230 is stabilized, and when the bottom die 220 is turned by the turning mechanism 240, it is possible to preferably prevent the preform 20 from coming off the holding mechanism 230. In addition, by appropriately changing the size of the projection 27, the shape of the preform can be easily changed.
- the holding portion 232 is provided independently of the bottom mold 220, and is configured to be openable and closable by a driving member (opening / closing mechanism 234) connected below the bottom mold 220 via a link mechanism. ing.
- a driving member opening / closing mechanism 234
- the holding of the projection 27 by the holding portion 232 can be strengthened, and when the bottom die 220 is turned by the turning mechanism 240, the preform 20 is preferably prevented from coming off from the holding mechanism 230. Can be prevented.
- the claw portion 233 is provided on the holding portion 232 of the holding mechanism 230.
- the protrusion 27 can be firmly held, and when the bottom die 220 is rotated by the rotation mechanism 240, the preform 20 is preferably prevented from coming off the holding mechanism 230. Can be.
- FIG. 7 is a view showing a container 10A which is one mode of a bent container having a large inclination angle.
- 7A shows a state when the container 10A is viewed from the opening side
- FIG. 7B shows a state of the front of the container 10A
- FIG. 7C shows a state of the right side of the container 10A.
- FIG. 7 (d) shows a state of the container 10A taken along the line EE
- FIG. 7 (e) shows a state of the container 10A taken along the line FF.
- the basic mode of the container 10A is the same as that of the container 10, but a detailed description will be given including possible variations such as the inclination angle X and the dimensions of the container.
- the container 10A includes a neck portion 12A having an opening 11A, a body portion 13A formed so as to be continuous with the neck portion 12A and defining a side wall portion of the container 10A, and a bottom portion 14A formed so as to be continuous with the body portion 13A. (See the embodiment of the container 10 in FIG. 1).
- the bottom portion 14A includes an outer edge portion that is formed in a horizontal plane and serves as a ground contact surface, and an upper bottom portion that is recessed toward the body portion 13A to form a concave portion.
- the inclination angle X formed by an axis A passing through the center of the neck opening 11A and orthogonal to the opening surface and an axis B extending in the vertical direction of the container is in the range of 50 to 80 °.
- the inclination angle X is preferably in the range of 60 ° ⁇ 5 ° or 60 ° to 70 °.
- the shape of the horizontal cross section of the body 13A of the container 10A is substantially such that the neck bending direction can be grasped when grasping and using. It has a flat shape.
- the shape of the cross section of the trunk 13A of the container 10A is determined by the width of the trunk 13A (the vertical length of the trunk on the paper in FIGS. 7D and 7E) and the depth. (Length in the left-right direction of the trunk on the paper in FIGS. 7D and 7E) is different. From the difference between the width and the depth, the direction of the neck bending can be grasped.
- the container 10A in FIG. 7 has a shape in which the width is smaller than the depth.
- the direction extending in the horizontal diameter direction of the opening 11A may be defined as the width direction of the container, and the direction in which the axis perpendicular to the opening surface formed by the opening 11A may be defined as the depth direction of the container.
- the body 13A of the container 10A includes an upper body 13a whose depth gradually increases downward (the width in the left-right direction on the paper surface in FIG. 7B) and a lower body 13b having substantially the same diameter as the body 13A. ing.
- the upper body portion 13a includes an inclined surface portion 13c that is inclined along a direction substantially orthogonal to the axis A, and a curved surface portion 13d (shoulder portion) that is bent so as to extend in a vertical direction as the distance from the neck portion 12A increases.
- the body 13A of the container 10A includes a first vertical surface 13e, a second vertical surface 13f, and a third vertical surface 13g, which are planar portions extending in the vertical direction. When the container 10A is viewed from the right side (FIG.
- the first vertical surface 13e is a substantially flat surface that is located at the center of the body 13A and extends from the bottom 14A of the container 10A to the neck 12A. Part. When the container 10A is viewed from the right side (FIG. 7 (c)), two second vertical surfaces 13f are present so as to sandwich the first vertical surface 13e, and extend from the bottom 14A to the curved surface 13d. This is a substantially flat portion.
- the third vertical surface portion 13g is adjacent to the second vertical surface portion 13f at a position opposite to the first vertical surface portion 13e of each of the second vertical surface portions 13f (FIG. 7B), and has a bottom portion 14A. It is a substantially planar portion extending from to the neck 12A.
- the cross-sectional shape of the trunk portion 13A is substantially on the side (FF cross section) near the bottom portion 14A. It has a hexagonal shape (FIG. 7 (e)), and a substantially pentagonal shape near the neck 12A (EE section) (FIG. 7 (d)).
- the above-mentioned first, second and third vertical plane parts 13e, 13f and 13g mean first, second and third plane parts extending in the vertical direction, respectively.
- an overhang 215A (an overhanging trace) that protrudes outward (projects downward in the vertical direction) from the bottom 14A.
- the overhang portion 215A (the overhang trace portion) is formed so as to fall within the range of the depth of the depression of the bottom portion 14A (the depth of the upper bottom portion).
- the container 10A can be molded using the mold 200 and the preform 20 described in the above embodiment.
- the overhang portion 215A is the overhang portion 25 of the preform 20 remaining after the molding of the container 10A.
- the protruding portion 27 remains in the overhanging portion 215A of the container 10A, like the overhanging portion 25 of the preform 20 (not shown).
- the overhang 25 provided on the preform 20 for molding the container 10A is provided on the central axis of the preform 20.
- the preform can be stretched by the stretching rod 132 in the above-described mold 200 and the overhanging portion 25 can be suitably gripped by the holding mechanism 230. Therefore, a recess serving as a mark sandwiched by the sandwiching mechanism 230 is formed in the overhang portion 215A.
- the projecting portion 215A of the container 10A formed by bending the preform 20 may not be provided at the center of the container 10A.
- the container 10A has a height of 10 to 20 cm (preferably 13 cm ⁇ 3 cm), a width of 2 to 6 cm (preferably 3 ⁇ 1 cm), and a depth of 3 to 10 cm (preferably 4 ⁇ 1 cm).
- the rigidity and grip of the container 10A can be improved. Further, by forming the overhang portion 215A so as to be within the range of the depth of the depression of the bottom portion 14A, the ground stability of the container 10A can be ensured.
- the present invention is not limited to the above-described embodiment, and may be appropriately modified and improved.
- the materials, shapes, dimensions, numerical values, forms, numbers, arrangement locations, and the like of the components in the above-described embodiments are arbitrary and are not limited as long as the present invention can be achieved.
- the mode of the neck bending container 10 having the inclination angle of about 60 ° has been described.
- it can be manufactured by stretch blow molding.
- the operation of the rotation mechanism 240 may be not only the rotation but also an operation configured by horizontal movement or linear and multi-step diagonally upward movement.
- the pressurized medium for blowing the preform 20 air is used as an example.
- a gaseous medium other than air may be used, or the pressurized medium may be pressurized using a liquid medium such as water. .
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Abstract
Description
底型と、ネック型と、挟持機構と、回動機構と、を備えるブロー成形用金型であって、
前記挟持機構は、前記底型に独立して設けられて、プリフォームの底部にゲート部と独立して設けられた突起部を掴むことが可能なように構成されており、
前記回動機構は、前記挟持機構により前記突起部を掴んだ状態の前記底型を、前記ネック型で保持された静止状態の前記プリフォームの首部に対して回動させることが可能に構成されている。
ブロー成形用金型の割型が開いている状態で、前記ブロー成形用金型に収容されたプリフォームの底部にゲート部と独立して設けられた突起部を、前記ブロー成形用金型の底型に独立して設けられた挟持機構で掴む挟持工程、
前記突起部を掴んでいる前記底型を、ネック型で保持された静止状態の前記プリフォームの首部に対して回動させて、前記プリフォームを曲げる曲工程、および
前記割型を閉じて加圧媒体により前記プリフォームを延伸させるブロー工程、
を有する。
前記挟持工程の前に、延伸ロッドにより前記プリフォームの前記底部を前記底型に向かって延伸させる予備延伸工程を有すると好ましい。
開口を備える首部と、首部と連なるように形成されて側壁部分を規定する胴部と、胴部と連なるように形成された底部と、から構成される樹脂製の容器であって、
前記開口の中心を通り、前記開口が成す開口面に直交する軸と、前記容器の鉛直方向に延びる軸と、が成す傾斜角が50°以上80°以下であり、
前記開口の水平な直径方向に延びる方向を容器の幅方向とし、前記開口が成す開口面に直交する軸が伸びる方向を容器の奥行方向とした時に、
前記胴部の水平断面の幅方向の長さと奥行方向の長さとが異なる、
ストレッチブロー成形法より製造される容器である。
前記底部が、前記底部の外表面から外側へ張り出す張出部を備える、と好ましい。
前記胴部は、前記開口が成す開口面に直交する軸と直交する向きに沿って傾斜する傾斜面部を備える上方胴部と、前記上方胴部と連なり鉛直方向に沿って伸びる下方胴部とを備え、
前記上方胴部および前記下方胴部の水平断面の形状が多角形状であり、
前記上方胴部の多角形状の水平断面の角の数が、前記下方胴部の多角形状の水平断面の角の数よりも少ない、と好ましい。
Claims (6)
- 底型と、ネック型と、挟持機構と、回動機構と、を備えるブロー成形用金型であって、
前記挟持機構は、前記底型に独立して設けられて、プリフォームの底部にゲート部と独立して設けられた突起部を掴むことが可能なように構成されており、
前記回動機構は、前記挟持機構により前記突起部を掴んだ状態の前記底型を、前記ネック型で保持された静止状態の前記プリフォームの首部に対して回動させることが可能に構成されている、ブロー成形用金型。 - ブロー成形用金型の割型が開いている状態で、前記ブロー成形用金型に収容されたプリフォームの底部にゲート部と独立して設けられた突起部を、前記ブロー成形用金型の底型に独立して設けられた挟持機構で掴む挟持工程、
前記突起部を掴んでいる前記底型を、ネック型で保持された静止状態の前記プリフォームの首部に対して回動させて、前記プリフォームを曲げる曲工程、および
前記割型を閉じて加圧媒体により前記プリフォームを延伸させるブロー工程、
を有する、樹脂製容器のブロー成形方法。 - 前記挟持工程の前に、延伸ロッドにより前記プリフォームの前記底部を前記底型に向かって延伸させる予備延伸工程を有する、
請求項2に記載のブロー成形方法。 - 開口を備える首部と、首部と連なるように形成されて側壁部分を規定する胴部と、胴部と連なるように形成された底部と、から構成される樹脂製の容器であって、
前記開口の中心を通り、前記開口が成す開口面に直交する軸と、前記容器の鉛直方向に延びる軸と、が成す傾斜角が50°以上80°以下であり、
前記開口の水平な直径方向に延びる方向を容器の幅方向とし、前記開口が成す開口面に直交する軸が伸びる方向を容器の奥行方向とした時に、
前記胴部の水平断面の幅方向の長さと奥行方向の長さとが異なる、
ストレッチブロー成形法より製造される容器。 - 前記底部が、前記底部の外表面から外側へ張り出す張出部を備える、請求項4に記載の容器。
- 前記胴部は、前記開口が成す開口面に直交する軸と直交する向きに沿って傾斜する傾斜面部を備える上方胴部と、前記上方胴部と連なり鉛直方向に沿って伸びる下方胴部とを備え、
前記上方胴部および前記下方胴部の水平断面の形状が多角形状であり、
前記上方胴部の多角形状の水平断面の角の数が、前記下方胴部の多角形状の水平断面の角の数よりも少ない、請求項4又は請求項5に記載の容器。
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CN201980059898.0A CN112689557A (zh) | 2018-07-17 | 2019-07-16 | 用于吹塑成型的模具,使用其制造树脂容器的方法,和树脂容器 |
KR1020227035976A KR102678465B1 (ko) | 2018-07-17 | 2019-07-16 | 수지제의 용기 |
KR1020217004532A KR102456985B1 (ko) | 2018-07-17 | 2019-07-16 | 블로우 성형용 금형, 이것을 사용한 수지제 용기의 제조방법 및 수지제의 용기 |
JP2020531318A JP7390291B2 (ja) | 2018-07-17 | 2019-07-16 | ブロー成形用金型、これを用いた樹脂製容器の製造方法および樹脂製の容器 |
US17/260,720 US11951670B2 (en) | 2018-07-17 | 2019-07-16 | Mold for blow molding, method for manufacturing resin container using same, and resin container |
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PCT/JP2019/027947 WO2020017505A1 (ja) | 2018-07-17 | 2019-07-16 | ブロー成形用金型、これを用いた樹脂製容器の製造方法および樹脂製の容器 |
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US (1) | US11951670B2 (ja) |
JP (1) | JP7390291B2 (ja) |
KR (1) | KR102456985B1 (ja) |
CN (1) | CN112689557A (ja) |
TW (1) | TWI714171B (ja) |
WO (1) | WO2020017505A1 (ja) |
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2019
- 2019-07-16 JP JP2020531318A patent/JP7390291B2/ja active Active
- 2019-07-16 CN CN201980059898.0A patent/CN112689557A/zh active Pending
- 2019-07-16 US US17/260,720 patent/US11951670B2/en active Active
- 2019-07-16 WO PCT/JP2019/027947 patent/WO2020017505A1/ja active Application Filing
- 2019-07-16 KR KR1020217004532A patent/KR102456985B1/ko active IP Right Grant
- 2019-07-17 TW TW108125251A patent/TWI714171B/zh active
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JPH01264808A (ja) * | 1988-04-18 | 1989-10-23 | Dainippon Printing Co Ltd | 合成樹脂製壜体用予備成形体、その製造方法、それを用いた二輪延伸ブロー壜体及びその複合容器 |
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JPH0373316A (ja) * | 1989-08-14 | 1991-03-28 | Dainippon Printing Co Ltd | ブロー成形用変形パリソンの製造方法、製造装置及び延伸ブロー成形壜体の製造方法 |
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JP2018030629A (ja) * | 2016-08-26 | 2018-03-01 | 大日本印刷株式会社 | プラスチックボトル、及び充填体 |
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TW202017728A (zh) | 2020-05-16 |
US11951670B2 (en) | 2024-04-09 |
JP7390291B2 (ja) | 2023-12-01 |
KR20210030456A (ko) | 2021-03-17 |
KR20220146677A (ko) | 2022-11-01 |
TWI714171B (zh) | 2020-12-21 |
US20210299936A1 (en) | 2021-09-30 |
JPWO2020017505A1 (ja) | 2021-08-02 |
CN112689557A (zh) | 2021-04-20 |
KR102456985B1 (ko) | 2022-10-19 |
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