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WO2024179982A1 - Procédé d'introduction d'un outil expansible dans un récipient - Google Patents

Procédé d'introduction d'un outil expansible dans un récipient Download PDF

Info

Publication number
WO2024179982A1
WO2024179982A1 PCT/EP2024/054800 EP2024054800W WO2024179982A1 WO 2024179982 A1 WO2024179982 A1 WO 2024179982A1 EP 2024054800 W EP2024054800 W EP 2024054800W WO 2024179982 A1 WO2024179982 A1 WO 2024179982A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
expandable tool
neck
accordance
expandable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2024/054800
Other languages
English (en)
Inventor
Christian CARLSEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paper Bottle Co AS
Original Assignee
Paper Bottle Co AS
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 Paper Bottle Co AS filed Critical Paper Bottle Co AS
Priority to CN202480008872.4A priority Critical patent/CN120898042A/zh
Publication of WO2024179982A1 publication Critical patent/WO2024179982A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
    • D21J3/10—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of hollow bodies
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J7/00—Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould

Definitions

  • the present invention relates to a method and a device for introducing an expandable tool into a container, in particular into a fiber-based container, and to a method for reducing the water content in a wet fiber-based container in accordance with the preamble of the independent claims.
  • a fiber-based blank in the form of a container was disclosed in WO 2012/139590 Al.
  • so-called pulp is injected into an upsidedown mold and pressed against a corresponding wall in this mold using a flexible balloon and compressed accordingly.
  • the pulp is compressed and heated to a temperature of around 180°C in order to dry the container .
  • the pulp is a mixture of fibers and water, in particular natural fibers such as hemp fibers, cellulose fibers or flax fibers or a mixture thereof.
  • the pulp has additives that, for example, improve the curing of the compressed pulp or have an influence on the later appearance or generally change the properties of the pulp or the later container.
  • the flexible balloon of WO 2012/139590 Al can substantially correspond to the shape of the container to be manufactured.
  • this has the disadvantage that the flexible balloon can have diameters that are larger than openings of the container. The insertion and removal of the flexible balloon can thus damage the container by contact. To avoid this, it is provided to twist the flexible balloon.
  • a device is arranged in the flexible balloon and connected thereto .
  • a method for introducing an expandable tool into a container and preferably a corresponding device is to be provided, which is simple, counteracts excessive wear of the expandable tool and, in particular, avoids damage to the container.
  • a method in accordance with the invention relates to a method for introducing an expandable tool into a container.
  • the container has a container body and a container neck and is in particular a fiber-based container.
  • the expandable tool similarly has a body and a neck. The method comprises at least the following steps :
  • the expandable tool is blown into the container through the neck of the expandable tool such that the expandable tool is turned back, or inverted, into its original configuration .
  • everted means that the interior of the expandable tool is turned or has been turned outward .
  • the expandable tool By introducing the expandable tool by means of injection, a complicated device for moving the expandable tool can be dispensed with.
  • the expandable tool is accordingly no longer deformed by a fixed mechanism, but is deformed at the points of natural folding, i.e., where there is the least resistance.
  • a turnover edge is typically formed on the expandable tool so that it is rolled into the container. This results in a very gentle introduction of the expandable tool into the container.
  • the expandable tool is provided in the everted form within a pressure chamber.
  • a speci fic environment can be created for the expandable tool , i . e . , an environment that is , for example , isolated from the surroundings
  • the pressure chamber can also have corresponding preferred dimensions .
  • the pressure chamber can be designed such that its inner diameter or generally its inner dimension transverse to a longitudinal axis is smaller than the corresponding dimension of the expandable tool in its everted form .
  • it is possible for example , for the expandable tool to rest on an inner wall of the pressure chamber in its everted form .
  • the pressure chamber is substantially tubular and the expandable tool is likewise substantially cylindrical . Accordingly, the pressure chamber and the expandable tool have a substantially circular cross section transverse to the respective longitudinal axis .
  • the pressure chamber is preferably longer in an axial direction than the everted expandable tool . I f the everted expandable tool is now blown into the container to be manufactured from the side of a base , i . e . , a side opposite the neck, the base of the expandable tool moves into the expandable tool and rolls along the inner wall of the pressure chamber inside the expandable tool . The base of the expandable tool is subsequently moved into the container through the neck of the expandable tool .
  • a longitudinal axis or the longitudinal axis is typically defined by the connection of a base of the container to a dispensing opening of the container. This also applies analogously to the expandable tool. In the present case, the longitudinal axis coincides with the machining direction.
  • the expandable tool might collapse upon the application of pressure.
  • the sidewalls of the body of the expandable tool are folded in the area of then neck of the expandable tool and the body of the expandable tool is rolled into the container to be manufactured along the inner wall of the container.
  • the pressure chamber is pressurized by a fluid, in particular compressed air, in order to blow the expandable tool into the container.
  • everting means moving the interior of the expandable tool outward through the neck of the expandable tool.
  • a vacuum is applied to the expandable tool , it begins to collapse .
  • a base of the expandable tool will begin to move into the interior of the expandable tool , i . e . , collapse .
  • This process then causes the side walls of the expandable container to begin to fold over, providing a turnover edge , so that they are also rolled into the interior of the expandable tool .
  • a vacuum continues to be applied to the expandable tool , the base or the side walls will roll further into the interior of the expandable tool and then move outward through the neck of the expandable tool , leaving it in the everted form .
  • a vacuum can be applied to the pressure chamber .
  • a dry lubricant is applied to the interior of the expandable tool before the first use or at certain intervals in order to prevent excessive adhesion of the expandable tool to other elements , in particular within the pressure chamber .
  • the dry lubricant may be starch or flour, preferably talc .
  • the expandable tool can have a geometrically similar contour to the inner contour of the finished container with a scaling factor of greater than 50%, preferably greater than 80%, in particular greater than 90% and preferably between 94% and 98%.
  • the expandable tool can in particular have a congruent contour with respect to the container.
  • a correspondingly similar or congruent contour ensures that the expandable tool always expands uniformly and that the loads on the expandable tool are correspondingly uniformly applied.
  • a substantially cylindrical expandable tool in this region would have to expand differently in order to map the contour of the bottle.
  • the expandable tool has substantially the same elongation at each point of the container during a subsequent pressing operation.
  • an overpressure is applied to the expandable tool for blowing in the expandable tool, the overpressure being preferably at least 0.1 bar but not more than 2 bar.
  • the expandable tool is preferably held in the region of its neck.
  • the expandable tool can have a thickened portion on its neck.
  • this thickened portion may be configured to protrude radially, in particular circumferentially around the neck.
  • the expandable tool can be held easily and does not need to be stretched in the region of the thickened portion during insertion or removal.
  • a turnover edge is correspondingly arranged radially inward of the thickened portion.
  • an expandable tool into the wet fiberbased container, the expandable tool being provided in an everted form for introducing the expandable tool and being blown into the container through its own neck, in particular in accordance with a method as described herein,
  • the expandable tool By blowing in the expandable tool, it can be gently introduced into the wet fiber-based container without the need for additional tools.
  • the expandable tool introduced in this way liquid can be pressed out of the wet fiber-based container and the moisture, i.e., the water content, of the fiber-based container can be significantly reduced.
  • the wet fiber-based blanks are typically shaped as already known in the prior art.
  • pulp is introduced into a porous casting mold or into a solid casting mold having water-draining channels, the inlets of which are covered with screens or the openings of which are small enough that the fibers of the pulp cannot penetrate, and the fibers of the pulp are applied to the inner wall of the casting mold so as to form a wall of a container.
  • the coating of the pulp stops.
  • the semi-finished product now present i.e., the wet fiber-based container, is removed from the casting mold and introduced into the mold and thus provided in the mold .
  • the wet fiber-based container has a water content of approximately 75% .
  • the wet fiber-based container is removed from the casting mold using a suitable trans fer device . Subsequently, the wet fiber-based container is inserted into the opened mold .
  • the mold is preferably formed in two parts . In this case , removal and insertion may require blowing out and/or a suction by means of negative or positive pressure . It is also possible to use purely mechanical grippers for this trans fer .
  • the mold can have an inner wall that i s designed with a higher surface qual ity compared to the inner wall of the casting mold .
  • the expandable tool is introduced into the fiber-based container as described in the present case .
  • the water content of the fiber-based container can be reduced by expanding the expandable tool .
  • the wet fiber-based container has a water content of approximately 50% to 60 % .
  • a further aspect relates to a device for introducing an expandable tool into a container, in particular in accordance with a method as described herein .
  • the device has a mold for receiving a wet fiber-based container .
  • the device has a pressure chamber that is arranged opposite the mold .
  • a vacuum or an overpressure can be produced in a simple manner in the region of an opening of the mold and can create specific process conditions for elements located in the pressure chamber .
  • an expandable tool having a neck is arranged within the pressure chamber .
  • An opening on the mold for a container neck and the neck of the expandable tool are arranged opposite one another .
  • a holding device for holding the expandable tool is preferably arranged between the pressure chamber and the mold .
  • the holding device can be des igned in two parts , compri sing a retainer ring and a corresponding counterpart , a press ing ring .
  • the press ing ring can be designed as an integral component o f the pres sure chamber .
  • the pres sure chamber is connected to a device for producing an overpressure or a vacuum .
  • a device for producing an overpressure or a vacuum is connected to a device for producing an overpressure or a vacuum . This results in a substantially closed circuit that is substantial ly independent of environmental inf luences .
  • the pressure chamber has an inner diameter that is smaller than an outer diameter of the expandable tool in its everted form .
  • these diameter geometries reference is explicitly made to the relationships already described in relation to the method for introducing the expandable tool into the container, and a repetition is dispensed with. The aforementioned advantages are fully applicable in the present case.
  • Fig. 1 shows an expandable tool in its original configuration
  • Fig. 2 shows the expandable tool from Fig. 1 in an everted form, together with a mold
  • Fig. 3 shows the beginning of the blowing in of the expandable tool into the mold
  • Fig. 4 shows the completely blown-in expandable tool
  • Fig. 5 shows the completely blown-in expandable tool in its original configuration
  • Fig. 6 shows a holding device in an open representation
  • Fig. 7 shows the holding device from Fig. 6 with a clamped expandable tool.
  • Fig. 1 shows an expandable tool 20 in its original configuration.
  • the expandable tool 20 has a base 24, a body 21 and a neck 22.
  • a thickened portion 23 is arranged on the neck 22.
  • the thickened portion 23 extends circumferentially around an opening on the neck 22.
  • the thickened portion 23 is displaced radially outward in relation to the neck 22 so that said thickened portion provides a larger diameter in the present case than the neck 22 .
  • the expandable tool 20 has a shape that substantially corresponds to the shape of a container to be formed . In other words , the contour of the expandable tool 20 is matched to the contour of the later container .
  • Fig . 2 shows the expandable tool 20 from Fig . 1 in an everted form, together with a mold 50 .
  • a container 30 is arranged within the mold 50 and is still wet in the present case and therefore has a moisture of more than 70% .
  • the container 30 is shown only schematically and fills the mold 50 .
  • the container 30 rests against the inner wall of the mold 50 .
  • the container itsel f has a container body 31 and a container neck 32 . Between the container body 31 and the container neck 32 is a container shoulder (not speci fied in greater detail ) . In the region of the container shoulder, a diameter of the container neck 22 expands to a diameter of the container body 31 .
  • the expandable tool 20 is arranged so that the container neck 32 and the neck 22 oppose one another .
  • the pressure chamber 40 in which the expandable tool 20 is located and the holding device 60 are not shown in this illustration .
  • the expandable tool 20 , the pressure chamber 40 , the holding device 60 , the container 30 and the mold 50 are all aligned along a common longitudinal axis .
  • Fig . 3 shows the beginning of the blowing in of the expandable tool 20 into the mold 50 , or into a container 30 arranged therein .
  • compressed air is applied to the pressure chamber 40.
  • the side walls of the body 21 of the expandable tool 20 adjoining the base 24 collapse.
  • the so collapsed side walls begin to move in the direction of the interior of the container 30 or of the mold 50.
  • the side walls begin to fold over, providing a turnover edge, in the area of the thickened portion 23 (see also Fig. 6) and roll along the interior of the container wall of the container 30 to be manufactured.
  • the side walls thus slide over the interior of the expandable tool, which is already partially turned back through the neck 22 and the neck 32 into the container 30, as in the illustration in accordance with Fig. 3.
  • the process of turning back the expandable tool i.e. introducing the expandable tool into the container, is slightly different. If there is a high amount of friction between the expandable tool and the pressure chamber, upon application of the necessary pressure, the base 24 of the expandable tool 20 begins to move into the expandable tool 20. The side walls of the container body 21 adjoining the base 24 are folded over, providing a turnover edge, and roll along a tool wall in the direction of the interior of the container 30 or of the mold 50. As this process progresses, the base 24 of the expandable tool 20 moves through the neck 22 and the neck 32 moves into the container 30. Fig. 4 now shows the expandable tool 20 completely blown into the container 30. During the further inflation, the expandable tool will assume its original configuration shown in Fig. 1.
  • FIG. 5 This configuration is shown in Fig. 5.
  • the outer contour of the expandable tool 20 is substantially identical to the inner contour of the container 30, or is scaled to approximately 95%.
  • Fig. 6 shows a holding device 60 comprising a retaining ring 61 and a corresponding counterpart, a pressing ring 62.
  • the pressing ring 62 is designed as an integral component of the pressure chamber 40.
  • the holding device 60 is provided to hold the expandable tool 20.
  • a thickened portion 23 is formed on the expandable tool 20.
  • the thickened portion 23 is formed in the form of a circumferential bead that protrudes radially outwardly in relation to a longitudinal axis of the expandable tool 20.
  • a correspondingly complementary recess is provided in the retaining ring 61.
  • the thickened portion 23 is inserted into the corresponding recess on the retaining ring 61. Subsequently, the pressing ring 62, and in the present case the pressure chamber 40 together with the integral pressing ring 62 , is placed on the thickened portion 23 .
  • the pressing ring 62 also has a recess for interacting with the thickened portion 23 .
  • This configuration makes it possible for the expandable tool 20 , as shown in Fig . 7 , to be able to be turned back upward or downward, hence , inverted and everted, easily and without interference in the embodiment shown in Fig . 7 .

Landscapes

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

Abstract

La présente invention concerne un procédé et un dispositif pour introduire un outil expansible (20) dans un récipient (30), le récipient (30) présentant un corps de récipient (31) et un goulot de récipient (32). L'outil extensible (20) comporte un corps (21) et un goulot (22). Le procédé comprend les étapes consistant à : - fournir l'outil expansible (20) sous une forme évasée - maintenir le goulot (22), - fournir le récipient (30) de telle sorte que le goulot de récipient (32) et le goulot (22) sont agencés en regard l'un de l'autre. Pour introduire l'outil extensible (20) dans le récipient (30), l'outil extensible (20) est soufflé dans le récipient (30) à travers le goulot (22).
PCT/EP2024/054800 2023-02-27 2024-02-26 Procédé d'introduction d'un outil expansible dans un récipient Ceased WO2024179982A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202480008872.4A CN120898042A (zh) 2023-02-27 2024-02-26 用于将可扩展工具引入到容器中的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23158851.8A EP4421237A1 (fr) 2023-02-27 2023-02-27 Procédé d'introduction d'un outil extensible dans un récipient
EP23158851.8 2023-02-27

Publications (1)

Publication Number Publication Date
WO2024179982A1 true WO2024179982A1 (fr) 2024-09-06

Family

ID=85384296

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/054800 Ceased WO2024179982A1 (fr) 2023-02-27 2024-02-26 Procédé d'introduction d'un outil expansible dans un récipient

Country Status (3)

Country Link
EP (1) EP4421237A1 (fr)
CN (1) CN120898042A (fr)
WO (1) WO2024179982A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1029978A2 (fr) * 1999-02-18 2000-08-23 Kao Corporation Procédé de préparation d'un corps fibreux moulé
WO2012139590A1 (fr) 2011-04-15 2012-10-18 Ecoxpac A/S Récipient

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1029978A2 (fr) * 1999-02-18 2000-08-23 Kao Corporation Procédé de préparation d'un corps fibreux moulé
WO2012139590A1 (fr) 2011-04-15 2012-10-18 Ecoxpac A/S Récipient

Also Published As

Publication number Publication date
EP4421237A1 (fr) 2024-08-28
CN120898042A (zh) 2025-11-04

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