WO2023187877A1 - Plaque à motif - Google Patents

Plaque à motif Download PDF

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Publication number
WO2023187877A1
WO2023187877A1 PCT/JP2022/014903 JP2022014903W WO2023187877A1 WO 2023187877 A1 WO2023187877 A1 WO 2023187877A1 JP 2022014903 W JP2022014903 W JP 2022014903W WO 2023187877 A1 WO2023187877 A1 WO 2023187877A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
surface plate
reinforcing
pattern
reinforcing plate
Prior art date
Application number
PCT/JP2022/014903
Other languages
English (en)
Japanese (ja)
Inventor
雅俊 山岡
隆宏 奥島
太一 川中
淳一 宮崎
Original Assignee
有限会社山岡
ニチダイフィルタ株式会社
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 有限会社山岡, ニチダイフィルタ株式会社 filed Critical 有限会社山岡
Priority to JP2023532297A priority Critical patent/JPWO2023187877A1/ja
Priority to PCT/JP2022/014903 priority patent/WO2023187877A1/fr
Publication of WO2023187877A1 publication Critical patent/WO2023187877A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators

Definitions

  • the present invention relates to a pattern plate used in an apparatus for manufacturing an absorbent body for absorbent articles such as disposable diapers.
  • Disposable diapers, sanitary napkins, and the like are used as examples of absorbent articles that absorb excretory fluids such as urine and menstrual blood.
  • absorbent articles are made by molding fluid absorbent materials containing pulp fibers, granular superabsorbent polymers (hereinafter also referred to as SAP) into single sheets as members for absorbing excretory liquid. It has an absorbent body made of
  • the above-mentioned absorbent body is produced by, for example, a manufacturing apparatus as shown in Patent Document 1 (Japanese Patent Laid-Open No. 2014-100440).
  • Patent Document 1 Japanese Patent Laid-Open No. 2014-100440
  • a schematic configuration of the manufacturing apparatus will be described with reference to FIG. 5 in the present application.
  • the manufacturing device 11 has a rotating drum 12. On the outer circumferential surface 12D of the rotating drum 12, a plurality of pattern plates 21, which will be described later, are arranged in parallel in the circumferential direction D so that an absorbent body P is formed.
  • a negative pressure section 12a, a positive pressure section 12b, and a no-pressure section are defined by partition walls that do not follow the rotation of the rotating drum 12 but are fixed, and the axis of the rotating drum 12 is set at a predetermined angle. 12c, and is further provided with an intake/exhaust mechanism (not shown) that takes in air in the negative pressure section 12a and exhausts air in the positive pressure section 12b.
  • a dispersion duct 13 is provided at a predetermined position in the circumferential direction D of the rotating drum 12, facing the negative pressure section 12a within the rotating drum 12.
  • This dispersion duct 13 is for dispersing a powdered absorbent material Z mixed with pulp fibers, SAP, etc. toward the outer circumferential surface 12D of the rotating rotating drum 12 located in the negative pressure section 12a.
  • the pattern plate 21 When passing through the area of the position of the spreading duct 13 (negative pressure section 12a) in the circumferential direction D of the rotating drum 12, the pattern plate 21 is The absorbent material Z is deposited on the holes 21a by suction.
  • FIG. 6 and 7 show the relationship between the rotating drum 12 and the pattern plate 21 provided on the circumferential surface of the rotating drum 12.
  • FIG. 6 is a schematic perspective view of the rotating drum 12 with a part of the pattern plate 21 removed
  • FIG. 7 is an exploded perspective view showing the structure of the pattern plate 21.
  • the pattern plate 21 has an arc shape corresponding to the curvature of the outer circumferential surface 12D of the rotating drum 12 in terms of the number of divisions, and includes a surface plate 21A in which a plurality of holes 21a are formed, and the surface plate 21A (in the rotating drum 12). Bars B1 and B2 are fixed in contact with the inner circumferential surface of the surface plate 21A for lining and reinforcement from the inner circumferential surface, and the reinforcing plate 21B is assembled in a frame lattice shape and partially covers the surface plate 21A. It has a guide plate 21C that exposes the hole 21a of the surface plate 21A within the intended shape range of the absorber P in plan view.
  • the frame edges that define (form) the holes 21a of the surface plate 21A are worn out due to the spray pressure (impact) of the absorbent material Z, and the frame edges are gradually lost. , damage to the surface plate 21A occurs, such as a large hole with continuous holes 21a opening.
  • a reinforcing plate 21B in the pattern plate 21 is provided.
  • the reinforcing plate 21B may have a structure such as a grid of bar portions B1 and B2 as shown in the figure, or a structure such as a coarse wire mesh or a punching plate, but the common conditions are that the absorbent material Z is It has a thickness and structure that will not bend as a whole even when subjected to the impact of time.
  • the surface plate 21A and the reinforcing plate 21B are usually integrated. Integration is, for example, a method such as laminating the surface plate 21A and the reinforcing plate 21B (and the guide plate 21C) and bolting the edges, or laminating the surface plate 21A and the reinforcing plate 21B and performing diffusion bonding. is commonly adopted.
  • bolting and diffusion bonding also have advantages and disadvantages. If the surface plate 21A is bolted, if the surface plate 21A is damaged, only the surface plate 21A can be replaced, but since the entire contact surface between the surface plate 21A and the reinforcing plate 21B is not joined, the rotating drum cannot be replaced during use.
  • the positive pressure and negative pressure of 12 cause the surface plate 21A to pulsate and flutter against the reinforcing plate 21B, and the absorbent material Z intervenes between the surface plate 21A and the reinforcing plate 21B, and the reinforcing plate 21B This may cause the surface plate 21A to float, making it impossible to provide reinforcement to the reinforcing plate 21B, resulting in an increased frequency of breakage.
  • the entire contact surface between the award plate 21A and the reinforcing plate 21B is bonded, so the pulsation that occurs with the bolting described above will not occur, and the frequency of breakage will be lower; however, if the surface plate 21A is damaged. , it is necessary to replace everything including the reinforcing body 21B, which increases the replacement cost.
  • the surface plate 21A is softened by annealing and becomes easily damaged.
  • the present invention addresses the problem that conventional pattern plates are unable to both easily replace the surface plate when it is damaged and reduce the frequency of breakage during use.
  • the present invention provides a pattern plate used in a manufacturing apparatus for manufacturing absorbent articles, which includes a surface plate in which a plurality of holes are formed, and a layered pattern plate on the back surface of the surface plate. and a reinforcing plate having a plurality of holes formed therein, the pattern plate having a bonding and peeling layer formed between opposing surfaces of the surface plate and the reinforcing plate.
  • the bonding and peeling layer can be peeled off from the reinforcing plate if the surface plate is damaged, so the problem of integrating the surface plate and the reinforcing plate by conventional diffusion bonding can be solved.
  • the opposing surfaces of the surface plate and reinforcing plate are joined, so the problem of integrating the surface plate and reinforcing plate using conventional bolts can be solved, which is an advantage. be.
  • FIG. 1 is an exploded perspective view showing a pattern plate of the present invention.
  • FIG. 2 is a partially enlarged perspective view of a surface plate and a reinforcing plate of the pattern plate of the present invention.
  • 1 shows a pattern plate of the present invention, in which (a) is a partially enlarged view, and (b) is a cross-sectional view taken along the line AA in (a). It is a figure showing the relationship between a rotating drum and a pattern plate of the present invention.
  • 1 is a diagram showing a schematic configuration of a conventional manufacturing device. It is a figure which shows the relationship between the conventional rotating drum and the conventional pattern plate.
  • FIG. 2 is a diagram showing a schematic configuration of a conventional pattern plate.
  • the present invention aims to obtain a pattern plate that is easily replaceable and has excellent durability. This was achieved by providing a reinforcing plate with holes formed therein, and forming a bonding and peeling layer between the facing surfaces of the surface plate and the reinforcing plate.
  • the bonding and peeling layer means a layer that can be applied and peeled off. Therefore, the bonding and peeling layer must be able to maintain a securely bonded state during use, be able to be peeled off if the surface plate is damaged, and ensure that the holes in the surface plate and the holes in the reinforcing plate are not blocked. Just satisfy it.
  • the bonding/separation layer may require a force of 20 to 60 N when peeling the surface plate from the reinforcing plate. That is, this 20 to 60N is a level that ensures reliable bonding between the surface plate and the reinforcing plate and allows easy peeling of the reinforcing plate. If the bonding and peeling layer is applied with a force smaller than 20N, the bonding will be insufficient and the surface plate and the reinforcing plate may shift or peel off during use.On the other hand, if the force is larger than 60N, It is difficult to peel off and workability decreases.
  • the reinforcing plate may have a configuration in which several holes of the surface plate are formed into a unit hole group, and ribs are formed that connect portions of the unit hole group with no holes.
  • the ribs in the reinforcing plate have a shape in which several holes in the surface plate are used as a unit hole group and the parts of the unit hole group that have no holes are connected, for example, 3 in the upper layer, 4 in the middle, and 3 in the lower layer, for a total of 10 ribs.
  • the unit hole group may be set as a unit hole group, and the portions without holes at the outer edge of this unit hole group may be connected to form a rib.
  • the area surrounded by the ribs does not block the holes in the surface plate, and the ribs form holes (openings) that penetrate the front and back of the reinforcing plate, which are larger than the hole diameter of the surface plate.
  • the reinforcing plate on which ribs are formed improves the rigidity of the surface plate, and the pattern plate can be removed from the rotating drum to ensure cleaning from the back side of the reinforcing plate.
  • the present invention may have a structure in which a plurality of reinforcing plates are laminated and integrated. If there is any concern about the reinforcement surface, a plurality of reinforcing plates may be laminated and integrated.
  • diffusion bonding can improve rigidity and provide strong integrity. By doing this, the rigidity of the entire pattern plate is improved, and since the depth of the holes in the surface plate does not increase, clogging can be suppressed even if the thickness is increased.
  • FIGS. 1 to 3 An embodiment of the present invention will be described with reference to FIGS. 1 to 3.
  • the overall configuration of the manufacturing apparatus for absorbent articles is not the point of the present invention and is the same as explained in the prior art section, so the explanation in this embodiment is omitted, and the explanation is redundant with FIGS. 5 and 6 in this embodiment.
  • the same reference numerals will be given to the same members, and the explanation will be omitted.
  • the pattern plate 1 of the present invention is provided on the circumferential surface of the rotating drum 12 in the manufacturing apparatus for manufacturing the absorbent article shown in FIG. 5 (in place of the pattern plate 21 in FIGS. 5 and 6).
  • a plurality of pattern plates 1 cover the outer circumferential surface 12D of the rotating drum 12, and one of the pattern plates 1 has an arc shape corresponding to the curvature corresponding to the number of divisions of the rotating drum 12.
  • the pattern plate 1 includes a surface plate 2 in which a plurality of holes 2a are formed, a reinforcing plate 3 provided in a laminated manner on the back surface of this surface plate 2, and a part of the surface plate 2. It has a guide plate 4 that covers and exposes the hole 2a of the surface plate 2 in a planar view shape range of the intended absorber P, and is used as a bonding/separation layer between the facing surfaces of the surface plate 2 and the reinforcing plate. In the example, for example, a projection welding layer 5 is formed.
  • the surface plate 2 is desirably thin in consideration of clogging of the holes 2a with the absorbent material Z, and the material used is, for example, a stainless steel material having excellent corrosion resistance and appropriate rigidity.
  • the surface plate 2 has a circular hole 2a with a diameter of 0.45 mm formed by etching in a thickness of 0.3 mm.
  • the surface plate 2 has positioning holes (not shown) formed at the four corners, so that it can be positioned with the reinforcing plate 3 with high precision. Since the thin surface plate 2 can be used for the holes 2a, the holes 2a can be formed by etching with a hole diameter and pitch according to the order.
  • the reinforcing plate 3 is a stainless steel plate having the same size as the surface plate 2 and with positioning holes (not shown) formed in the four corners at the same positions as the surface plate 2A.
  • the hole 2a in this example, a total of six holes 2a, one in the center and five around it, is defined as a unit hole group 2A, and the connecting portion is a peripheral portion forming the holes 2a in the unit hole group 2A.
  • the etching process is performed to form ribs 3A connecting the ribs 2b.
  • nine reinforcing plates 3 are laminated in this order from the outer circumferential side of the rotating drum 12, using mutual positioning holes to precisely align the ribs 3A of the upper and lower layers so that they do not shift. The whole is then diffusion bonded to form a single piece.
  • the reinforcing plate 3 is made of, for example, stainless steel in this example due to its durability and corrosion resistance, but the thickness of the plate does not need to be as thin as the surface plate 2, and may be the maximum thickness that the ribs 3A can be etched. Bye.
  • the area surrounded by the ribs 3A is approximately hexagonal (or lotus leaf-shaped), and the reinforcing plate 3 corresponds only to the connecting portion 2b of the surface plate 2, does not block the hole 2a, and is larger than the diameter of the hole 2a of the surface plate 2.
  • a substantially hexagonal hole (opening) penetrating the front and back sides of is formed by the ribs 3A, and the reinforcing plate 3 in which the ribs 3A are formed reinforces the rigidity of the surface plate 2.
  • the plurality of reinforcing plates 3 may all have the same rib 3A (opening) shape, for example, or each or some of them, or all of the reinforcing plates 3 may have the same rib 3A (opening) shape. It may be a shape. However, in this case, the configuration is such that the ribs 3A do not close the openings formed by the ribs 3A that are adjacent to each other in the stacking direction.
  • the projection welding layer 5, which is the bonding and peeling layer in this example, is formed between the back surface of the surface plate 2 and the surface of the reinforcing plate 3 facing the surface plate 2, as shown in FIG. 3, for example.
  • This refers to a layer in which a protrusion 5A formed by etching is interposed on the end face of a rib 3A that is the surface of the reinforcing plate 3 facing the surface plate 2 of the reinforcing plate 3.
  • the surface plate 2 and the reinforcing plate 3 are stacked together, and a current of, for example, 300 to 1500 A is applied between the surface of the surface plate 2 and the back surface of the lowest layer of the reinforcing plate 3, and the protrusion 5A generates heat due to electrical resistance. Then, the protrusion 5A, the surface plate 2, and the reinforcing plate 3 are welded and joined. If the current value is lower than 300 A, the surface plate 2 may be displaced from the reinforcing plate 3 when the pattern plate 1 is used, and if the current value is higher than 1500 A, the welding becomes strong and difficult to remove.
  • the planar area, pitch (number), and energization time of the protrusions 5A, including the current value, are adjusted so that the force required to peel the surface plate 2 from the reinforcing plate 3 is 20 to 60 N.
  • the force required for this peeling is based on the JIS C 5016: 1994 Flexible Printed Wiring Board Peeling Test (90° direction peeling), P90-200N 90° Peeling Test Jig manufactured by Imada Co., Ltd. This is a value measured using a ZTS-5N digital force gauge manufactured by Imada Co., Ltd. using a test attachment.
  • the surface plate 2 can be prevented from shifting from the reinforcing plate 3 or even partially peeling off when the pattern plate 1 is used. Moreover, when the surface plate 2 is damaged, there is no possibility that the operator cannot peel it off by hand in order to replace it.
  • the projection welding layer 5 adopted as the bonding/separation layer in the above embodiment of the pattern plate 1 of the present invention is originally a bonding technique specialized for bonding, that is, a bonding technique that does not assume peeling. Another feature is that it is used for joining the surface plate 2 and the reinforcing plate 3. Therefore, the present invention is not particularly limited as long as the bonding satisfies the conditions that it can be reliably bonded and later peeled off by the operator's hands.
  • the projection welding layer 5 is formed over the entire surface facing the surface plate 2 and the reinforcing plate 3, including the area not exposed from the guide plate 4 (the area hidden by the guide plate 4). Although described above, for example, only the area exposed from the guide plate 4 may be replaced.
  • the surface plate 2 is divided into an area exposed from the guide plate 4 and an area not exposed, and in the area exposed from the guide plate 4, the surface plate 2 is replaced.
  • the hole 2a and the rib 3A of the reinforcing plate 3 may be formed, and the projection welding layer 5 may be interposed therebetween.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Laminated Bodies (AREA)

Abstract

[Problème] Pour adresser le problème des plaques à motif classiques, dans lesquelles il n'est pas possible à la fois de remplacer facilement une plaque de surface lorsqu'elle est détériorée ou similaire et de réduire la fréquence des détériorations durant l'utilisation. [Solution] Cette plaque à motif (1) est utilisée dans un dispositif de fabrication pour fabriquer un article absorbant, et comprend : une plaque de surface (2) dans laquelle une pluralité de trous (2a) sont formés ; et une plaque de renforcement (3) disposée d'une manière empilée sur la surface arrière de la plaque de surface (2) et ayant une pluralité de trous formés à l'intérieur (par des nervures (3A)), une couche de soudage de projection (5) (couche de jonction/libération) étant formée entre des surfaces opposées de la plaque de surface (2) et de la plaque de renforcement (3). [Effets] La couche de soudage de projection (5) maintient un état articulation sans la plaque de surface (2) et la plaque de renforcement (3) s'écartant ou décollée durant l'utilisation de la plaque à motif (1), et un travailleur peut décoller la plaque de renforcement (3) à la main lorsque la plaque de surface (2) est endommagée durant l'utilisation.
PCT/JP2022/014903 2022-03-28 2022-03-28 Plaque à motif WO2023187877A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2023532297A JPWO2023187877A1 (fr) 2022-03-28 2022-03-28
PCT/JP2022/014903 WO2023187877A1 (fr) 2022-03-28 2022-03-28 Plaque à motif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/014903 WO2023187877A1 (fr) 2022-03-28 2022-03-28 Plaque à motif

Publications (1)

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WO2023187877A1 true WO2023187877A1 (fr) 2023-10-05

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ID=88199673

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PCT/JP2022/014903 WO2023187877A1 (fr) 2022-03-28 2022-03-28 Plaque à motif

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JP (1) JPWO2023187877A1 (fr)
WO (1) WO2023187877A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006122109A (ja) * 2004-10-26 2006-05-18 Daio Paper Corp 吸収性物品の製造装置、吸収性物品の製造方法およびこれを用いて製造した吸収性物品
KR20100055135A (ko) * 2008-11-17 2010-05-26 주식회사 씨엠아이 성형 스크린 및 성형 스크린의 형성 방법, 스크린 인서트, 및 성형 드럼 장치
JP2010178919A (ja) * 2009-02-05 2010-08-19 Uni Charm Corp 吸収体の製造装置、及び通気性部材の製造方法
JP2011147872A (ja) * 2010-01-21 2011-08-04 Kansai Kanaami Kk 積層焼結フィルター
JP2012050568A (ja) * 2010-08-31 2012-03-15 Unicharm Corp 吸収体の製造装置、及び通気性部材の製造方法
JP2017533754A (ja) * 2014-11-05 2017-11-16 ジーディーエム エス．ピー．エー．Ｇｄｍ Ｓ．Ｐ．Ａ． 成形くぼみ、及び成形くぼみを作製するための方法
WO2018042544A1 (fr) * 2016-08-31 2018-03-08 ユニ・チャーム株式会社 Dispositif de fabrication d'un corps absorbant et procédé de fabrication d'un corps absorbant

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006122109A (ja) * 2004-10-26 2006-05-18 Daio Paper Corp 吸収性物品の製造装置、吸収性物品の製造方法およびこれを用いて製造した吸収性物品
KR20100055135A (ko) * 2008-11-17 2010-05-26 주식회사 씨엠아이 성형 스크린 및 성형 스크린의 형성 방법, 스크린 인서트, 및 성형 드럼 장치
JP2010178919A (ja) * 2009-02-05 2010-08-19 Uni Charm Corp 吸収体の製造装置、及び通気性部材の製造方法
JP2011147872A (ja) * 2010-01-21 2011-08-04 Kansai Kanaami Kk 積層焼結フィルター
JP2012050568A (ja) * 2010-08-31 2012-03-15 Unicharm Corp 吸収体の製造装置、及び通気性部材の製造方法
JP2017533754A (ja) * 2014-11-05 2017-11-16 ジーディーエム エス．ピー．エー．Ｇｄｍ Ｓ．Ｐ．Ａ． 成形くぼみ、及び成形くぼみを作製するための方法
WO2018042544A1 (fr) * 2016-08-31 2018-03-08 ユニ・チャーム株式会社 Dispositif de fabrication d'un corps absorbant et procédé de fabrication d'un corps absorbant

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