WO2015025797A1 - 把手付き容器の製造方法、把手付き容器の製造装置および把手付き容器 - Google Patents
把手付き容器の製造方法、把手付き容器の製造装置および把手付き容器 Download PDFInfo
- Publication number
- WO2015025797A1 WO2015025797A1 PCT/JP2014/071448 JP2014071448W WO2015025797A1 WO 2015025797 A1 WO2015025797 A1 WO 2015025797A1 JP 2014071448 W JP2014071448 W JP 2014071448W WO 2015025797 A1 WO2015025797 A1 WO 2015025797A1
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- WIPO (PCT)
- Prior art keywords
- handle
- container
- intermediate molded
- molded body
- blow molding
- Prior art date
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Classifications
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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
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/10—Handles
- B65D23/104—Handles formed separately
- B65D23/106—Handles formed separately the gripping region of the handle extending between the neck and the base of the bottle or jar and being located in a radial plane comprising the axis of the bottle or jar
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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
- B29C49/18—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using several blowing steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/482—Moulds with means for moulding parts of the parisons in an auxiliary cavity, e.g. moulding a handle
-
- 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
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/28—Handles
- B65D25/2882—Integral handles
- B65D25/2885—Integral handles provided on the side wall
-
- 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
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2017—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements outside the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2021—Inserts characterised by the material or type
- B29C2049/2034—Attachments, e.g. hooks to hold or hang the blown article
- B29C2049/2039—Handles, e.g. handles or grips on bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/003—PET, i.e. poylethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/253—Preform
- B29K2105/258—Tubular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- 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 manufacturing method for manufacturing a container with a handle, a manufacturing apparatus for a container with a handle, and a container with a handle.
- the container with a handle as described above is generally manufactured by blow-molding a preform made of a polycarbonate resin having high heat resistance.
- a synthetic resin such as polycarbonate resin that uses bisphenol A as a raw material dissolves the bisphenol A component when washed with a strong detergent or when it is brought into contact with an acid / high temperature liquid.
- An object of the present invention is to provide a manufacturing method of a container with a handle, a manufacturing apparatus for a container with a handle, and a container with a handle that can attach a handle to the container body while increasing the heat resistance of the container body made of polyethylene terephthalate resin. It is in.
- the intermediate molded body is placed in a blow mold holding a handle on the inner surface, and the intermediate molded body is blow-molded in a state where the handle is brought close to the intermediate molded body, thereby expanding in the blow mold.
- a container body having high heat resistance is molded from a preform made of polyethylene terephthalate resin by blow molding multiple times in a primary blow molding process and a secondary blow molding process. Can do. And in a secondary blow molding process, a handle can be certainly assembled
- a part of the handle may be pressed against the intermediate molded body in the secondary blow molding step.
- a part of the handle is pressed against and contacted with the intermediate molded body during the secondary blow molding process, so that the handle is bitten into the container body that expands by blow molding.
- the handle can be assembled more securely.
- a non-contact portion between the handle and the intermediate molded body is formed in the vicinity of a position where the handle is pressed against the intermediate molded body during the secondary blow molding step. May be.
- an intermediate molded body that expands by blow molding can be obtained by forming a non-contact portion in the vicinity of a position where the handle is pressed against the intermediate molded body during the secondary blow molding process. It will be smoothly deformed around the non-contact portion. Therefore, the handle can be more reliably assembled to the container body.
- a concave portion is formed in a part of the intermediate molded body at the time of the primary blow molding step, and the handle is attached to the intermediate molded body at the start of blowing in the secondary blow molding step.
- the handle in the manufacturing method of the container with a handle of the present invention, a bar-shaped gripping portion that can be gripped, and a connection portion connected to the gripping portion at the upper and lower ends with a gap between the gripping portion.
- the mounting rod portion and the intermediate molded body are used having a mounting rod portion that is disposed and a locking portion that protrudes substantially vertically from the upper and lower ends of the mounting rod portion.
- the assembling portion may be formed of a part of the container body that enters the connecting portion side of the locking portion and locks the locking portion.
- the mountain-shaped protrusions lock both the left and right sides of the mounting rod portion and the connecting portion. Therefore, the handle is assembled to the container main body in a state where movement in the horizontal direction with respect to the container main body is restricted by the mountain-shaped protrusions. Further, the assembled portion locks the handle locking portion. Therefore, the handle is placed in the container body in a state in which movement in the up and down direction and the direction away from the container body (the direction in which the handle is separated from the container body, the direction from the mounting bar part to the gripping part) is restricted by the assembled part. Assembled. Thereby, the fixing strength of the handle with respect to the container body can be significantly increased.
- the manufacturing apparatus of the container with a handle of the present invention that can solve the above-mentioned problems is as follows.
- the intermediate molded body is placed in a blow mold holding a handle on the inner surface, and the intermediate molded body is blow-molded in a state where the handle is brought close to the intermediate molded body, thereby expanding in the blow mold.
- Secondary blow molding means for assembling the handle to a container body made of the intermediate molded body It is characterized by including.
- a container with a handle made of polyethylene terephthalate resin having excellent heat resistance can be manufactured by executing the manufacturing method described above.
- the blow mold of the secondary blow molding means of the manufacturing apparatus of the present invention may have a handle holding portion that holds a part of the handle pressed against the intermediate molded body and brought into contact therewith. According to this configuration, it is possible to manufacture a container with a handle in which the handle is more reliably assembled to the container body.
- the primary blow molding means of the manufacturing apparatus of the present invention can mold an intermediate molded body having a recess, and the blow mold can hold the handle in a state in which the handle does not contact the intermediate molded body. You may have a holding
- the container with a handle of the present invention that can solve the above-mentioned problems is characterized by being formed by any one of the above-described manufacturing methods.
- the container with a handle manufactured in this way is excellent in heat resistance, and the handle is difficult to come off from the container body.
- the manufacturing method of the container with a handle which can attach a handle to a container main body, improving the heat resistance of the container main body made from a polyethylene terephthalate resin, and the container with a handle which can perform the manufacturing method A manufacturing apparatus and a container with a handle can be provided.
- FIG. 1 It is a figure which shows the container with a handle manufactured by the manufacturing method of the container with a handle concerning this embodiment, Comprising: (a) is a side view, (b) is the front view seen from the handle mounting part side. It is a figure which shows the attachment location of the handle of the container with a handle manufactured by the manufacturing method of the container with a handle concerning this embodiment, (a) is a partial sectional view seen from the side, (b) is (a) FIG. It is a figure explaining the manufacturing method of the container with a handle concerning this embodiment, (a) is a side view of a preform, (b) is a side view of an intermediate fabrication object, and (c) is a side view of a container with a handle. It is.
- FIGS. 6A to 6C are views showing the state where the handle is assembled to the container body, and FIGS. 6A to 6C are cross-sectional views taken along line AA in FIGS. It is a schematic block diagram of the manufacturing apparatus of a container with a handle.
- the container 11 with a handle includes a container body 12 and a handle 13.
- the container body 12 is molded from polyethylene terephthalate (PET) resin.
- the container body 12 includes a barrel portion 21 that is formed in a cylindrical shape, a bottom portion 22 that constitutes the bottom surface of the trunk portion 21, and a shoulder portion 23 that constitutes the upper portion of the trunk portion 21. Further, the container body 12 has a mouth portion 24 at the upper center thereof, and a shoulder portion 23 is provided between the mouth portion 24 and the trunk portion 21.
- a liquid flows into the container body 12 from the mouth portion 24. Further, the liquid in the container body 12 flows out from the mouth 24.
- a lid (not shown) is detachably attached to the mouth 24, and the container body 12 is sealed by attaching the lid to the mouth 24.
- the barrel portion 21 has a handle mounting portion 31 at a part of its peripheral surface.
- the handle mounting portion 31 is formed in a shape that is recessed substantially in a side view, and includes a bottom surface portion 31a and upper and lower wall surfaces 31b of the bottom surface portion 31a.
- a handle 13 is attached to the handle mounting portion 31 at the center in a front view.
- the handle 13 is formed from, for example, polypropylene (PP) resin or polyethylene terephthalate (PET) resin. As shown in FIGS. 2A and 2B, the handle 13 includes a grip portion 41 formed in a bar shape and a fixing portion 42 connected to the grip portion 41.
- the grip portion 41 is a portion that the operator grips when carrying the container 11 with the handle.
- the fixing part 42 is a part fixed to the container body 12.
- the fixing portion 42 includes a mounting rod portion 43 that is disposed substantially in parallel with the gripping portion 41 and is spaced from the upper and lower ends of the mounting rod portion 43 toward the upper and lower ends of the gripping portion 41. And a connecting portion 44 to be connected.
- the mounting rod portion 43 is shorter than the grip portion 41. Accordingly, the upper connecting portion 44 is inclined obliquely upward from the mounting rod portion 43 toward the grip portion 41, and the lower connecting portion 44 is inclined toward the grip portion 41 from the mounting rod portion 43. It is inclined downward.
- the mounting rod portion 43 is formed with locking portions 45 projecting substantially in the vertical direction at the upper and lower end portions thereof. Further, the mounting rod portion 43 is formed with an engaging projection portion 46 that protrudes to the opposite side of the grip portion 41 at an intermediate portion in the vertical direction. The engaging protrusion 46 is formed with a protruding portion 47 that protrudes in the vertical and horizontal directions at the tip. In addition, a pressing piece 48 is formed in the middle portion of the mounting bar 43 in the vertical direction and projects in the width direction (both left and right sides) (see FIG. 1B).
- the handle 13 is attached to a handle mounting portion 31 in the container body 12.
- a plurality of mountain-shaped protrusions 51 are formed on the handle mounting portion 31 of the container body 12. These mountain-shaped protrusions 51 are respectively formed on the upper side and the lower side of the pressing piece 48 of the handle 13.
- These mountain-shaped projections 51 are formed by part of the container body 12 bulging outward (to the grip portion side) on both sides in the width direction of the mounting rod portion 43.
- These mountain-shaped protrusions 51 engage the upper and lower end portions of the mounting rod portion 43 that constitutes the fixing portion 42 of the handle 13 and the left and right sides of the connecting portion 44. Thereby, the handle 13 is restricted from moving in the horizontal direction with respect to the container body 12 by the mountain-shaped protrusions 51.
- a plurality of assembled portions 52 are formed in the handle mounting portion 31 of the container body 12.
- the assembled portion 52 is formed so as to enter the connecting portion 44 side from the engaging portion 45 along the engaging portion 45 and the connecting portion 44.
- the assembled portion 52 locks the locking portion 45 of the handle 13.
- the grip 13 is restricted from moving in the vertical direction and away from the container main body 12 by the assembly portion 52 (the direction in which the handle 13 is separated from the container, the direction from the mounting rod portion 43 toward the grip portion 41). ing.
- a part of the container main body 12 bites into the mounting rod portion 43 side of the protruding portion 47 of the engaging protrusion 46 of the handle 13 and is formed along the shape of the engaging protruding portion 46. Thereby, the movement of the handle 13 in the up / down / left / right direction and the separating direction with respect to the container body 12 is restricted.
- the preform 61 used as the container main body 12 is prepared.
- the preform 61 is formed from a polyethylene terephthalate (PET) resin, and is formed in a bottomed cylindrical shape in which a mouth portion 24 is formed at an upper end portion.
- PET polyethylene terephthalate
- blow molding is performed on the preform 61 heated to an appropriate stretching temperature, thereby forming an intermediate molded body 62 smaller than the container body 12 as shown in FIG.
- the temperature of the primary blow mold (not shown) is adjusted with a rod heater or the like so as to be equal to or higher than the crystallization temperature of PET resin (about 140 ° C. to 180 ° C.).
- a preform 61 is placed inside the temperature-controlled primary blow mold, and high-pressure air is introduced into the preform 61 for about 20 seconds.
- the preform 61 into which the high-pressure air has been introduced is stretched and brought into contact with the inner wall surface of the primary blow mold to form a primary blow molded product 62A.
- the residual stress of the PET resin is relaxed and the crystallization density is improved (heat resistance is improved by heat setting treatment).
- the intermediate molded body 62 formed in this way is in a state of having a sufficient amount of heat for subsequent processing.
- a blow mold 71 is used in the secondary blow molding step.
- the blow mold 71 is composed of two split molds 72 and 73.
- the split mold 72 is a mold that molds the half of the container body 12 in the horizontal direction
- the split mold 73 is a mold that molds a half of the container body 12 in the horizontal direction including the handle mounting portion 31 to which the handle 13 is attached.
- the split mold 73 is provided with a handle holding portion 73a, and the handle 13 is held in the handle holding portion 73a.
- the intermediate molded body 62 is disposed in the blow mold 71 in a state where the split molds 72 and 73 are opened apart from each other, whereby the blow mold 71 is provided with the blow mold 71.
- the intermediate molded body 62 is set.
- the blow molds 71 are closed by bringing the split molds 72 and 73 close to each other. If it does in this way, as shown to Fig.5 (a), (b), the molding surface which consists of the inner surface of the split molds 72 and 73 will be arrange
- the container 11 with a handle is molded as shown in FIG. Specifically, the temperature of the blow mold 71 is raised to about 80 to 100 ° C. by circulating a temperature control medium, etc., and the intermediate molded body 62 in the blow mold 71 is adjusted to a suitable temperature for blow, which is a predetermined temperature. Then, high-pressure air is introduced into the intermediate molded body 62 from the opening 24 for about 15 seconds. In this way, the intermediate molded body 62 swells and is molded into the container body 12 having a shape along the molding surface formed by the inner wall surfaces of the split molds 72 and 73 of the blow mold 71. Further, when the intermediate molded body 62 swells to become the container body 12, the handle 13 held by the handle holding portion 73 a is assembled to the container body 12.
- the container main body 12 is formed of polyethylene terephthalate resin, it is difficult to use the heat resistance of the resin itself as compared with the polycarbonate resin.
- the heat resistance of the container body 12 made of polyethylene terephthalate resin is significantly increased by a plurality of heat treatments by performing the primary blow molding process and the secondary blow molding process.
- the container 11 with a handle is formed with at least two parting lines (lines between a pair of blow split molds) resulting from the primary blow mold and the blow mold 71 in a side view.
- the handle 13 held by the handle holding portion 73 a is obtained by clamping the blow mold 71 in a state where the intermediate molded body 62 is set on the blow mold 71. A part of the fixed portion 42 is pressed against and contacted with the peripheral surface of the intermediate molded body 62. Accordingly, the intermediate molded body 62 is elastically deformed by pressing the fixing portion 42 of the handle 13, and a part of the peripheral surface is disposed along the fixing portion 42 of the handle 13.
- the handle 13 is formed with an engaging protrusion 46 that protrudes to the opposite side of the grip 41 on the mounting rod 43 of the fixing portion 42.
- the intermediate molded body 62 is bent by pressing the upper and lower center portions of the mounting bar portion 43 of the fixed portion 42 to the opposite side of the gripping portion 41, and the intermediate molded body 62 is formed between the mounting rod portion 43 of the fixed portion 42 and the intermediate molded body 62.
- a non-contact portion S is formed between them.
- This non-contact portion S is formed in the vicinity of the periphery of the engaging projection 46 of the handle 13 that contacts the intermediate molded body 62.
- the central portion of the intermediate molded body 62 in the mounting bar portion 43 is pressed and curved toward the opposite side to the grip portion 41, so that a part of the intermediate molded body 62 is brought close to the vertical vicinity of the handle 13. .
- the intermediate molded body 62 When blowing starts in this state and the intermediate molded body 62 swells, the intermediate molded body 62 has a shape along the outer shape of the fixed portion 42 of the handle 13 as shown in FIGS. 6B and 7B. Deform. At this time, since the non-contact portion S is formed between the mounting rod portion 43 of the fixed portion 42 and the intermediate molded body 62, the intermediate molded body 62 is in overall contact with the mounting rod portion 43. In comparison, friction with the mounting rod portion 43 is suppressed. Thereby, the intermediate molded body 62 is easily deformed into a shape along the outer shape of the fixing portion 42 of the handle 13.
- mountain-shaped protrusions 51 engage the upper and lower end portions of the mounting rod portion 43 and the left and right sides of the connecting portion 44. Thereby, the handle 13 is assembled to the container main body 12 in a state in which the movement in the horizontal direction with respect to the container main body 12 is restricted by the mountain-shaped protrusions 51.
- a part of the container main body 12 enters the recess 44 a at the boundary portion between the locking portion 45 and the connecting portion 44 and is formed into a shape along the connecting portion 44, and this portion becomes the assembled portion 52.
- These assembled portions 52 lock the locking portion 45 of the handle 13.
- the handle 13 is assembled to the container main body 12 in a state where the assembling portion 52 restricts movement in the vertical direction and the direction away from the container main body 12.
- the handle 13 is assembled to the container main body 12 in a state where movement in the up / down / left / right direction and the separating direction with respect to the container main body 12 is restricted.
- a preform made of polyethylene terephthalate resin is blow-molded a plurality of times in the primary blow molding step and the secondary blow molding step.
- the container body 12 having high heat resistance can be formed from 61.
- the handle 13 can be assembled to the intermediate molded body 62 by blow molding in a state where the handle 13 is brought close to the intermediate molded body 62.
- the handle 13 since a part of the handle 13 is pressed against the intermediate molded body 62 and is in contact with the intermediate molded body 62 during the secondary blow molding process, the handle 13 is bitten into the container body 12 that is expanded by blow molding, and the handle is gripped against the container body 12. 13 can be assembled reliably.
- the handle 13 in the secondary blow molding process, by forming a non-contact portion S between the handle 13 and the intermediate molded body 62 in the vicinity of the pressed portion of the handle 13 to the intermediate molded body 62, an intermediate that expands by blow molding.
- the molded body 62 is smoothly deformed around the non-contact portion S. Therefore, the handle 13 can be more reliably assembled to the container body 12.
- the mountain-shaped protrusions 51 lock the left and right sides of the mounting rod portion 43 and the connecting portion 44. Therefore, the handle 13 is assembled to the container body 12 in a state in which the movement in the horizontal direction with respect to the container body 12 is restricted by the mountain-shaped protrusions 51. Moreover, the assembly
- the device 100 for manufacturing a container with a handle includes a first manufacturing unit 200 for manufacturing an intermediate molded product 62 (see FIG. 3), and a container 11 with a handle from the intermediate molded product 62 (see FIG. 1). ) And a second manufacturing unit 300 for manufacturing.
- the first manufacturing unit 200 includes an injection device 201 and an injection molding unit 202 that perform injection molding of the preform 61 (see FIG. 3), a temperature control unit 203 that adjusts the temperature of the preform 61 before primary blowing, and a preform 61. And a primary blow molding part 204 (an example of primary blow molding means) for forming a primary blow molded product 62A (see FIG. 3), and a take-out part 205.
- the primary blow molding unit 204 has a primary blow mold and a blow nozzle, and high pressure air can be introduced into the preform 61 disposed inside the primary blow mold using the blow nozzle.
- the preform 61 into which the high-pressure air has been introduced is stretched and brought into contact with the inner wall surface of the primary blow mold to form a primary blow molded product 62A.
- the primary blow molding unit 204 has a function of executing the above-described primary blow molding process.
- the take-out unit 205 takes out the primary blow-molded product 62A from the primary blow mold, and temporarily stores the intermediate molded body 62 whose volume is contracted by about 10 to 30% from the primary blow-molded product 62A.
- the second manufacturing unit 300 includes a mounting unit 301, a final blow molding unit 302, a handle supply device 303, and a collection unit 304.
- the mounting unit 301 mounts the intermediate molded body 62 supplied from the take-out unit 205 of the first manufacturing unit 200 to a transport unit (not shown) of the second manufacturing unit 300 by a moving unit (not shown).
- the final blow molding section 302 (an example of secondary blow molding means) has a blow mold 71 (see FIG. 4 and the like) and a blow nozzle.
- the handle supply device 303 accommodates a plurality of handles 13 (see FIG. 2) and supplies the handles 13 to the final blow molding unit 302.
- the final blow molding unit 302 has a blow nozzle in the intermediate molded body 62 in a state where the handle 13 supplied from the handle supply device 303 and the intermediate molded body 62 conveyed by the conveying means are set in the blow mold 71. It is possible to introduce high-pressure air using As described above, the final blow molding unit 302 has a function of executing the above-described secondary blow molding process.
- the collection unit 304 collects the container 11 with the handle that has been conveyed from the final blow molding unit 302, and then conveys the container 11 with the handle to a predetermined storage location using, for example, a belt conveyor.
- the primary blow molding step and the secondary blow molding step described above can be performed, and the handle made of polyethylene terephthalate resin having excellent heat resistance is attached.
- the container 11 can be manufactured.
- the preform 61 is blow-molded in the primary blow molding process, and then the intermediate molded body 62 is blow-molded in the secondary blow molding process, but in order to improve molding stability and molding quality, You may perform the preliminary blow process of the preform 61 before a primary blow molding process.
- the present invention can be applied not only to large returnable containers having a large capacity such as 3 gallons or 5 gallons (about 12 liters to 20 liters) but also to smaller containers.
- a part of the handle 13 is in contact with the peripheral surface of the intermediate molded body 62 in a state where the blow mold 71 in the secondary blow molding process is closed is described. It is not restricted and both do not need to contact. That is, in a state where the blow mold 71 is closed, a part of the handle 13 may be disposed at a position close to the peripheral surface of the intermediate molded body 62, that is, disposed in a close state.
- an intermediate molded body 63 having a recess 64 in a part of the side surface is prepared, and the handle 13 is disposed in a state where the handle 13 is not in contact with the intermediate molded body 63 at the start of the secondary blow molding process. This is different from the manufacturing method in the above-described example.
- (1) Primary blow molding process As a primary blow mold for molding a blow molded product, a primary blow mold having a convex portion for forming a concave portion in a part of a side wall of the blow molded product is used. By introducing high-pressure air into the preform 61 arranged inside the primary blow mold, the preform 61 is stretched to come into contact with the inner wall surface of the primary blow mold, and a primary blow having a recess in a part of the side wall. A molded product is formed.
- an intermediate molded body (for example, the intermediate molded body 63 shown in FIG. 9) whose volume is contracted by about 10 to 30% is formed.
- the intermediate molded body 63 has a concave portion 64 at a part of a substantially central portion in the vertical direction of the side wall.
- each part of the handle 13 held by the handle holding part 73a is also surrounded by the recess 64 of the intermediate molded body 63 even when the blow mold 71 is closed by bringing the split molds 72 and 73 close to each other. Arranged without touching the surface.
- the intermediate molded body 63 set in the blow mold 71 is blow-molded to a size close to the final molded product in the primary blow molding process, and the molding surface formed by the inner surfaces of the split dies 72 and 73 is the intermediate molded body 63. It is arranged in a state closer to the surroundings.
- the container 11 with a handle is shape
- the handle 13 disposed in the recess 64 of the intermediate molded body 63 ensures that each part of the handle 13 has a substantially uniform distance (space) with respect to the peripheral surface of the intermediate molded body 63. However, it arrange
- the intermediate molded body 63 is further expanded and molded into the container body 12.
- the intermediate molded body 63 having the concave portion 64 is formed in the primary blow molding process. Further, the handle 13 held by the handle holding portion 73a at the start of blowing in the secondary blow molding process is disposed in the concave portion 64 of the intermediate molded body 63 set in the blow mold 71. In addition, the handle 13 disposed in the recess 64 is disposed so as not to contact the peripheral surface of the intermediate molded body 63.
- the entire portion of the handle 13 on the fixed portion 42 side is likely to come into contact with the intermediate molded body 63 almost simultaneously during the process of the concave portion 64 of the intermediate molded body 63 bulging, and the swelled part is specified. It becomes difficult to concentrate pressure on the part. For this reason, in the process in which the intermediate molded body 63 swells, a molding defect such as a rupture or uneven thickness distribution occurs in a part of the intermediate molded body (particularly, a portion in contact with the engaging protrusion 46). Can be suppressed.
- the distance (gap) between each part of the handle 13 arranged in the recessed part 64 and the peripheral surface of the intermediate molded body 63 can be adjusted in advance.
- the intermediate position of the intermediate molded body 63 with respect to 13 can be accurately set.
- the shape of the intermediate molded body 63 set in the blow mold 71 is molded into a shape approximate to the final molded product in the primary blow molding process. For this reason, the final molded product formed in the secondary blow molding process can be molded stably and with high quality.
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Abstract
Description
しかしながら、ポリカーボネート樹脂のようなビスフェノールAを原料とする合成樹脂は、強力な洗剤で洗浄した場合や酸・高温の液体に接触させた場合に、ビスフェノールA成分が溶け出すことが指摘されている。
ポリエチレンテレフタレート樹脂製のプリフォームをブロー成形して中間成形体を成形する一次ブロー成形工程と、
内面に把手を保持したブロー型内に前記中間成形体を配置させ、前記中間成形体に対して前記把手を近接させた状態で前記中間成形体をブロー成形することにより、前記ブロー型内で膨張した前記中間成形体からなる容器本体に前記把手を組み付ける二次ブロー成形工程と、
を含むことを特徴とする。
この把手付き容器の製造方法によれば、二次ブロー成形工程時に、把手の一部を中間成形体に押し付けて接触させておくので、ブロー成形によって膨張する容器本体に把手を食い込ませ、容器本体に対して把手を更に確実に組み付けることができる。
この把手付き容器の製造方法によれば、二次ブロー成形工程時に、中間成形体への把手の押し付け箇所の近傍に非接触部を形成しておくことで、ブロー成形によって膨張する中間成形体が非接触部の周囲で円滑に変形することとなる。よって、容器本体に対して把手を更に確実に組み付けることができる。
これにより、中間成形体が膨らむ過程において中間成形体の一部に破裂が生じたり偏った肉厚分布が発生する等の成形不良が発生することを抑制することができる。
ポリエチレンテレフタレート樹脂製のプリフォームをブロー成形して中間成形体を成形する一次ブロー成形手段と、
内面に把手を保持したブロー型内に前記中間成形体を配置させ、前記中間成形体に対して前記把手を近接させた状態で前記中間成形体をブロー成形することにより、前記ブロー型内で膨張した前記中間成形体からなる容器本体に前記把手を組み付ける二次ブロー成形手段と、
を含むことを特徴とする。
まず、本発明に係る把手付き容器の製造方法によって製造される把手付き容器について説明する。
図3(a)に示すように、容器本体12となるプリフォーム61を用意する。このプリフォーム61は、ポリエチレンテレフタレート(PET)樹脂から成形されたもので、上端部に口部24が形成された有底円筒状に形成されている。
図4(a),(b)に示すように、二次ブロー成形工程では、ブロー型71を用いる。このブロー型71は、二つの割型72,73から構成されている。割型72は、容器本体12の水平方向における半分を成形する型であり、割型73は、把手13が取り付けられる把手装着部31を含む容器本体12の水平方向における半分を成形する型である。割型73には、把手保持部73aが設けられており、この把手保持部73aには、把手13が保持される。
図6(a)及び図7(a)に示すように、中間成形体62をブロー型71にセットした状態でブロー型71を型締めすることで、把手保持部73aに保持されている把手13は、その固定部42の一部が中間成形体62の周面に押し付けられて接触される。これにより、中間成形体62は、把手13の固定部42が押し付けられることで弾性変形し、周面の一部が把手13の固定部42に沿って配置される。
ブロー成形品を成形する一次ブロー型として、ブロー成形品の側壁の一部に凹部を形成するための凸部を有する一次ブロー型を用いる。この一次ブロー型の内部に配置したプリフォーム61内に高圧エアーを導入することにより、プリフォーム61が延伸されて一次ブロー型の内壁面に接触し、側壁の一部に凹部を有した一次ブロー成形品が形成される。
図9(a),(b)に示すように、割型72と割型73とが開かれた状態のブロー型71内に中間成形体63がセットされたとき、把手保持部73aに保持された把手13の固定部42側の部分は、中間成形体63の凹部64内に配置される。さらに、凹部64内に配置された把手13の各部(例えば係合突起部46,係止部45)は、中間成形体63の凹部64の周面に接触しない状態に配置される。
ブロー型71を型締めした状態において、中間成形体63の凹部64内に配置された把手13は、把手13の各部が中間成形体63の周面に対して略均一な距離(空間)を確保しつつ、その周面に接触していない状態で配置されている。
本出願は、2013年8月21日出願の日本特許出願・出願番号2013-171015に基づくものであり、その内容はここに参照として取り込まれる。
Claims (9)
- ポリエチレンテレフタレート樹脂製のプリフォームをブロー成形して中間成形体を成形する一次ブロー成形工程と、
内面に把手を保持したブロー型内に前記中間成形体を配置させ、前記中間成形体に対して前記把手を近接させた状態で前記中間成形体をブロー成形することにより、前記ブロー型内で膨張した前記中間成形体からなる容器本体に前記把手を組み付ける二次ブロー成形工程と、
を含むことを特徴とする把手付き容器の製造方法。 - 前記二次ブロー成形工程時に、前記把手の一部を前記中間成形体に押し付けて接触させておくことを特徴とする請求項1に記載の把手付き容器の製造方法。
- 前記二次ブロー成形工程時に、前記中間成形体への前記把手の押し付け箇所の近傍に前記把手と前記中間成形体との非接触部を形成しておくことを特徴とする請求項2に記載の把手付き容器の製造方法。
- 前記一次ブロー成形工程時に、前記中間成形体の一部に凹部を形成し、
前記二次ブロー成形工程におけるブロー開始時に、前記把手を前記中間成形体の凹部に前記中間成形体と接触させない状態で配置させておくことを特徴とする請求項1に記載の把手付き容器の製造方法。 - 前記把手として、把持可能な棒状の把持部と、前記把持部に対して上下端で連結部によって連結されて前記把持部との間に間隔をあけて配置された取付棒部と、前記取付棒部の上下端から略上下方向に突出する係止部とを有するものを用い、
前記二次ブロー成形工程において、前記取付棒部と前記中間成形体とを近接した状態に配置させ、前記取付棒部の幅方向における両側において前記把持部側に向けて突出して前記取付棒部及び前記連結部を係止する前記容器本体の一部からなる山状突起を成形するとともに、前記係止部よりも前記連結部側へ入り込んで前記係止部を係止する前記容器本体の一部からなる組み付き部を成形することを特徴とする請求項1から4のいずれか一項に記載の把手付き容器の製造方法。 - ポリエチレンテレフタレート樹脂製のプリフォームをブロー成形して中間成形体を成形する一次ブロー成形手段と、
内面に把手を保持したブロー型内に前記中間成形体を配置させ、前記中間成形体に対して前記把手を近接させた状態で前記中間成形体をブロー成形することにより、前記ブロー型内で膨張した前記中間成形体からなる容器本体に前記把手を組み付ける二次ブロー成形手段と、
を含むことを特徴とする把手付き容器の製造装置。 - 前記二次ブロー成形手段の前記ブロー型は、前記把手の一部を前記中間成形体に押し付けて接触させた状態で保持する把手保持部を有することを特徴とする請求項6に記載の把手付き容器の製造装置。
- 前記一次ブロー成形手段は、凹部を有する中間成形体を成形可能であり、
前記ブロー型は、前記凹部内において前記把手を前記中間成形体に接触させない状態で保持可能な把手保持部を有することを特徴とする請求項6に記載の把手付き容器の製造装置。 - 請求項1から5のいずれか一項に記載の把手付き容器の製造方法により形成されたことを特徴とする把手付き容器。
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JPWO2019212060A1 (ja) * | 2018-05-02 | 2021-05-13 | 日精エー・エス・ビー機械株式会社 | ブロー成形装置 |
US11331845B2 (en) | 2018-05-02 | 2022-05-17 | Nissei Asb Machine Co., Ltd. | Blow molding apparatus |
JP7254781B2 (ja) | 2018-05-02 | 2023-04-10 | 日精エー・エス・ビー機械株式会社 | ブロー成形装置 |
Also Published As
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US10183435B2 (en) | 2019-01-22 |
JP6397413B2 (ja) | 2018-09-26 |
TW201529426A (zh) | 2015-08-01 |
MX2016002253A (es) | 2016-06-06 |
TWI535630B (zh) | 2016-06-01 |
US20160207243A1 (en) | 2016-07-21 |
CN105451965B (zh) | 2018-04-24 |
JPWO2015025797A1 (ja) | 2017-03-02 |
CN105451965A (zh) | 2016-03-30 |
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