WO2016017059A1 - Récipient moulé par soufflage - Google Patents

Récipient moulé par soufflage Download PDF

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Publication number
WO2016017059A1
WO2016017059A1 PCT/JP2015/002964 JP2015002964W WO2016017059A1 WO 2016017059 A1 WO2016017059 A1 WO 2016017059A1 JP 2015002964 W JP2015002964 W JP 2015002964W WO 2016017059 A1 WO2016017059 A1 WO 2016017059A1
Authority
WO
WIPO (PCT)
Prior art keywords
blow
preform
mouth
central axis
molded container
Prior art date
Application number
PCT/JP2015/002964
Other languages
English (en)
Japanese (ja)
Inventor
雄一 奥山
満 塩川
Original Assignee
株式会社吉野工業所
雄一 奥山
満 塩川
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社吉野工業所, 雄一 奥山, 満 塩川 filed Critical 株式会社吉野工業所
Publication of WO2016017059A1 publication Critical patent/WO2016017059A1/fr

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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
    • B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
    • 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
    • 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

Definitions

  • the present invention relates to a blow molded container manufactured by blow molding.
  • Resin casings such as those made of drawn polypropylene (OPP) and polyethylene terephthalate (PET) are used for detergents, beverages, foods, cosmetics, etc. It is used for various purposes.
  • OPP drawn polypropylene
  • PET polyethylene terephthalate
  • a resin preform formed into a bottomed cylindrical shape by injection molding is heated to a temperature at which a stretching effect can be exhibited, and in this state, a blow molding apparatus
  • the preform is stretched in the longitudinal direction (axial direction) with a stretching rod, and the preform is stretched in the lateral direction (radial direction) by supplying pressurized air into the preform.
  • a biaxial stretch blow molding by air blow is known in which a preform is molded into a casing having a shape along a cavity of a mold (see Patent Document 1).
  • the center axis of the barrel is eccentric with respect to the center axis of the container mouth (that is, the center axis of the mouth and the center axis of the trunk are not collinear)
  • the distance from the outer surface of the preform placed on the mold to the cavity of the mold is not uniform in the circumferential direction. It was difficult to form with a thick wall and it was difficult to manufacture.
  • a preform having a special shape with a thickness changed in the circumferential direction is formed, and a mold is formed so that a thick portion of the preform is positioned at a position where the distance to the cavity is large.
  • a method of arranging the air blower and air blowing is conceivable.
  • a preform with a special shape must be molded, and the preform must be accurately positioned with respect to the mold, which complicates the structure of the device and increases the dimensional accuracy.
  • the molding efficiency may be deteriorated.
  • the preform is heated by a special heating method so that a temperature difference is formed in the circumferential direction so that a relatively low temperature portion is located at a position where the distance to the cavity is large.
  • a method of arranging can be considered. In this case, at the time of air blowing, the high temperature portion is preferentially stretched over the low temperature portion of the preform, so that it is possible to prevent the thickness of the portion where the distance to the cavity is large from becoming too thin.
  • the heating equipment is also complicated.
  • the present invention can be manufactured without using a preform having a special shape or a special heating method.
  • the trunk portion is flat, or the central axis of the trunk portion is decentered with respect to the central axis of the mouth portion.
  • An object of the present invention is to provide a blow molded container.
  • the blow-molded container of the present invention comprises a bottomed cylindrical preform mounted on a mold for blow molding, and then a pressurized liquid is added to the blow-molded container.
  • a blow molded container manufactured by biaxial stretch blow molding which is supplied into a preform and molded into a shape along the cavity of the mold,
  • the trunk is flat in a cross section perpendicular to the central axis of the trunk, or the central axis of the trunk is eccentric with respect to the central axis of the mouth.
  • the blow molded container of the present invention after mounting a bottomed cylindrical preform on a blow mold, supplies pressurized liquid to the inside of the preform, and into the cavity of the mold.
  • a blow molded container manufactured by biaxial stretch blow molding to be molded into a shape along A cylindrical mouth part, a hollow body part connected to the mouth part, and a bottom part closing the lower end opening of the body part,
  • the trunk is flat in a cross section perpendicular to the central axis of the trunk, and the central axis of the trunk is eccentric with respect to the central axis of the mouth.
  • the body can be manufactured without using a specially shaped preform or a special heating method, the body is flat, or the center axis of the body is decentered with respect to the center axis of the mouth. It is possible to provide a blow molded container.
  • FIG. 1 It is a front view of the blow molding container concerning one embodiment of the present invention.
  • A is an AA cross-sectional view of the blow molded container of FIG. 1
  • (b) is a plan view of the blow molded container shown in FIG. It is a figure which shows an example of the preform used when manufacturing the blow molding container which concerns on one Embodiment of this invention.
  • FIG. 1 is a front view of a blow molded container 1 according to an embodiment of the present invention.
  • the blow-molded container 1 includes a cylindrical mouth portion 2, a hollow barrel portion 3 connected to the mouth portion 2, and a bottom portion 4 that closes the lower end opening of the barrel portion 3.
  • the mouth portion 2 has a cylindrical shape and is provided with an outer screw portion 5 on the outer peripheral surface, and a cap (not shown) having an inner screw portion corresponding to the outer screw portion 5 can be attached and detached.
  • a neck ring 6 that protrudes from the outer peripheral surface of the mouth portion 2 is formed below the outer screw portion 5.
  • the trunk portion 3 has a relatively small diameter portion 7 that extends downward from the lower end of the mouth portion 2 while gradually increasing the diameter, and a main portion 8 that extends below the small diameter portion 7 and has a relatively large diameter.
  • the central axis C ⁇ b> 1 of the body portion 3 is parallel to the central axis C ⁇ b> 2 of the mouth portion 2 and is a cross section at the maximum cross-sectional area position of the main portion 8.
  • the line passes through the center point of the AA cross section.
  • the center axis C1 of the body portion 3 and the center axis C2 of the mouth portion 2 are assumed to extend in the vertical direction in the upright posture of the blow-molded container 1 shown in FIG.
  • the main part 8 of the body part 3 has a major axis L and a minor axis S that are orthogonal to each other in the AA cross section perpendicular to the central axis C1 of the body part 3. It has a flat shape.
  • the center axis C ⁇ b> 1 of the body part 3 is eccentric with respect to the center axis C ⁇ b> 2 of the mouth part 2.
  • the shape of the blow molded container 1 of the present embodiment is such that the body portion 3 is a flat shape and the center axis C1 of the body portion 3 is eccentric with respect to the center axis C2 of the mouth portion 2.
  • the center axis C1 of the trunk portion 3 may be eccentric with respect to the central axis C2 of the mouth portion 2, and the central axis of the mouth portion 2 is sufficient. Even when the central axis C1 of the body part 3 is not decentered with respect to C2, the body part 3 may be flat.
  • drum 3 is not limited to the shape which has the small diameter part 7 and the main part 8 like this embodiment, It can be set as arbitrary hollow shapes, and a convex part and a recessed part are partially formed. Including other shapes.
  • a preform previously formed by injection molding or the like is heated to a temperature suitable for blow molding and placed in a mold for blow molding.
  • the preform 10 is formed in a bottomed cylindrical shape as a whole by a resin material such as polypropylene or polyethylene terephthalate, and is cylindrical at the upper end of the main body portion 11 having the shape of the test tube. It is possible to use a shape in which the neck 12 is integrally provided with the neck ring 13 at the lower end of the mouth 12.
  • the thickness of the main body 11 of the preform 10 is uniform in the circumferential direction, and the gate position when the preform 10 is injection-molded is generally located at the lower end 14 of the main body 11 on the central axis C3. Is.
  • the preform 10 After the preform 10 is heated, the preform 10 is disposed along the central axis C3 so that the mouth 12 protrudes outside the mold and the main body 11 is in the cavity of the mold. At this time, the neck ring 13 is mounted on the mold in contact with the upper surface of the mold.
  • a nozzle unit having a stretching rod movable in the vertical direction is arranged from above, and the blow nozzle is fitted to the mouth portion 12. Then, while the stretching rod is moved downward to stretch the preform 10 in the longitudinal direction (axial direction), the pressurized liquid is supplied into the preform 10 through the blow nozzle to move the preform 10 in the lateral direction (
  • the preform 10 is formed into a casing having a shape along the cavity of the mold by stretching in the radial direction.
  • a nozzle unit that does not include a stretching rod it is possible to use a nozzle unit that does not include a stretching rod.
  • the reform 10 can be stretched in the longitudinal direction (axial direction) and the lateral direction (radial direction).
  • a mechanism for supplying pressurized liquid to the preform 10 for example, a servo plunger type plunger pump driven by an electric motor can be used.
  • the apparatus used for manufacture and the procedure of a process are not specifically limited, If it is biaxial stretch blow molding using the pressurized liquid, it is arbitrary.
  • the following apparatus and procedure can be employed.
  • the preform 10 is placed radially outward.
  • the portion where the distance to the cavity is small becomes thick because the stretch amount is small, while the portion where the distance to the cavity is large is stretched greatly and the thickness becomes thin, so that the thin portion In some cases, it was difficult to manufacture because breakage or perforation may occur.
  • the pressurized liquid (gas) is supplied into the preform 10 instead of the pressurized air (gas) as in this embodiment, the heat transfer coefficient of the liquid is higher than that of the gas.
  • the pressurized liquid to be supplied is set to a temperature lower than that of the heated preform 10.
  • the temperature of the pressurized liquid may be adjusted in advance using a temperature adjusting device, or may be managed at room temperature. Also, as the preform 10 is stretched and the thickness is reduced, the temperature is likely to decrease. When the temperature is decreased, the resin is difficult to be stretched. Therefore, in the process of blow molding, the thick and high temperature portion is preferential. Thus, the wall thickness is appropriately distributed. As a result, it is possible to mold with an appropriate thickness when a pressurized liquid is used compared to when pressurized air is used.
  • the gate position located at the lower end 14 of the main body 11 on the central axis C3 is the same as that at the bottom 4 in the blow molded container 1 shown in FIG. , It is located on the central axis C2 of the mouth part 2.
  • the body 3 is flat and the center axis C1 of the body 3 is eccentric with respect to the center axis C2 of the mouth 2.
  • the trunk portion 3 has a flat shape, and the central axis C1 of the trunk portion 3 is eccentric with respect to the central axis C2 of the mouth portion 2.
  • the trunk portion 3 has a flat shape.
  • the center axis C1 of the body 3 is eccentric with respect to the center axis C2 of the mouth 2, and the center axis C2 of the mouth 2 and the center axis C1 of the body 3 are on the same straight line. The effect of the present invention can be obtained even in a container having a flat portion 3.
  • the content liquid that is finally filled in the casing as a product such as detergent, beverage, cosmetics, and medicine is used.
  • this eliminates the step of filling the casing with the content liquid, thereby simplifying the production process and the configuration of the blow molding apparatus.
  • the method for manufacturing the blow molded container 1 has been described on the assumption that biaxial stretch blow molding is used, but it can also be applied to direct blow molding using a pressurized liquid. . Specifically, the parison extruded into a tube shape is sandwiched between molds, the bottom is closed and the bottom of the parison is made into a cylindrical shape, and a pressurized liquid is supplied and blow molded to stretch the parison, Mold into a shape along the mold cavity.

Landscapes

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

Abstract

L'invention concerne un récipient moulé par soufflage (1) fabriqué par moulage par soufflage avec étirage biaxial dans lequel une préforme moulée par injection qui a la forme d'un cylindre à fond est montée sur une filière pour moulage par soufflage, puis un liquide sous pression est introduit dans la préforme et moulé en forme de cavité de matrice. Le récipient moulé par soufflage (1) est caractérisé en ce qu'il comprend les éléments suivants : une ouverture cylindrique (2); une section de corps creux (3) qui est continue avec l'ouverture (2); et une section de fond (4) qui ferme l'ouverture d'extrémité inférieure de la section de corps (3), la section de corps (3) présentant une forme aplatie en coupe transversale perpendiculaire à l'axe central (C1) de la section de corps (3).
PCT/JP2015/002964 2014-07-30 2015-06-12 Récipient moulé par soufflage WO2016017059A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014155119A JP6280832B2 (ja) 2014-07-30 2014-07-30 ブロー成形容器の製造方法
JP2014-155119 2014-07-30

Publications (1)

Publication Number Publication Date
WO2016017059A1 true WO2016017059A1 (fr) 2016-02-04

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Application Number Title Priority Date Filing Date
PCT/JP2015/002964 WO2016017059A1 (fr) 2014-07-30 2015-06-12 Récipient moulé par soufflage

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JP (1) JP6280832B2 (fr)
WO (1) WO2016017059A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190283307A1 (en) * 2016-06-30 2019-09-19 Yoshino Kogyosho Co., Ltd. Container production method by liquid blow molding
US11964793B2 (en) 2018-12-20 2024-04-23 Nissei Asb Machine Co., Ltd. Resin-made container, resin-made container manufacturing method, resin-made container manufacturing apparatus, and mold

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019212060A1 (fr) * 2018-05-02 2019-11-07 日精エー・エス・ビー機械株式会社 Appareil de moulage par soufflage
JP7278890B2 (ja) * 2019-06-28 2023-05-22 株式会社吉野工業所 扁平ボトル及びその製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864413U (ja) * 1981-10-26 1983-04-30 株式会社吉野工業所 偏心壜形成用の合成樹脂製管状素材
JP2009057072A (ja) * 2007-08-31 2009-03-19 Yoshino Kogyosho Co Ltd 窓付き容器とその成形方法
JP2014069441A (ja) * 2012-09-28 2014-04-21 Yoshino Kogyosho Co Ltd ブロー成形装置及び容器の製造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05305934A (ja) * 1992-04-21 1993-11-19 Honshu Paper Co Ltd 押し潰し易いプラスチックボトルとその製造法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864413U (ja) * 1981-10-26 1983-04-30 株式会社吉野工業所 偏心壜形成用の合成樹脂製管状素材
JP2009057072A (ja) * 2007-08-31 2009-03-19 Yoshino Kogyosho Co Ltd 窓付き容器とその成形方法
JP2014069441A (ja) * 2012-09-28 2014-04-21 Yoshino Kogyosho Co Ltd ブロー成形装置及び容器の製造方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190283307A1 (en) * 2016-06-30 2019-09-19 Yoshino Kogyosho Co., Ltd. Container production method by liquid blow molding
US11718013B2 (en) * 2016-06-30 2023-08-08 Yoshino Kogyosho Co., Ltd. Container production method by liquid blow molding
US11964793B2 (en) 2018-12-20 2024-04-23 Nissei Asb Machine Co., Ltd. Resin-made container, resin-made container manufacturing method, resin-made container manufacturing apparatus, and mold

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Publication number Publication date
JP2016030428A (ja) 2016-03-07
JP6280832B2 (ja) 2018-02-14

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