EP0637353B1 - Equipement pour la fabrication d'articles a partir d'une pate fibreuse - Google Patents

Equipement pour la fabrication d'articles a partir d'une pate fibreuse Download PDF

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Publication number
EP0637353B1
EP0637353B1 EP93905228A EP93905228A EP0637353B1 EP 0637353 B1 EP0637353 B1 EP 0637353B1 EP 93905228 A EP93905228 A EP 93905228A EP 93905228 A EP93905228 A EP 93905228A EP 0637353 B1 EP0637353 B1 EP 0637353B1
Authority
EP
European Patent Office
Prior art keywords
projections
mould
papier
mâché
wire gauze
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.)
Expired - Lifetime
Application number
EP93905228A
Other languages
German (de)
English (en)
Other versions
EP0637353A1 (fr
Inventor
Poul Erik Jessen
Ib Jorgen Kjeldsen
René PIHL
Torben Rasmussen
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.)
Brodrene Hartmann AS
Original Assignee
Brodrene Hartmann 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
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Application filed by Brodrene Hartmann AS filed Critical Brodrene Hartmann AS
Publication of EP0637353A1 publication Critical patent/EP0637353A1/fr
Application granted granted Critical
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Classifications

    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J5/00—Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds

Definitions

  • the present invention relates to equipment of the kind set forth in the preamble of claim 1.
  • Pulp moulding dies of this kind for the production of egg flats or fruit packaging trays are e.g. known from GB-A-708393 and US-A-2903062 which solved a problem inherent to earlier pulp moulding dies, namely the undue stretching or distortion of the wire mesh.
  • the manufacture of such a die or mould necessitates, however, extensive machining for the shaping of both the base surface and the individual projections, and the die or mould is therefore costly to manufacture and may only be used profitably when producing extremely great numbers of articles such as the aforesaid egg flats or fruit packaging trays.
  • a preferred embodiment for the equipment according to the invention is set forth in claim 2.
  • a further preferred embodiment is set forth in claim 4.
  • Especially high-density polyethylene is cheap and easy to shape at low cost to the desired shapes, while its hydrophobic surface properties reduce the necessary cleaning of the suction mould.
  • a wire-gauze covering made in the manner indicated has proved to serve its purpose excellently, and the resistance welding of the wire gauze has proved not to reduce its permeability.
  • the suction mould may also exhibit the features set forth in claim 6.
  • a protruding rib will be formed between the ribs referred to on the side of the papier-mâché product facing the suction mould, while on the opposite side of the product a projection with a relatively plane surface will be formed, said projection, when dried papier-mâché products are stacked on top of each other and nested within each other, will abut against the protruding rib on the papier-mâché product lying immediately above, thus producing a certain spacing from the latter.
  • the present invention also relates to equipment of the kind set forth in the preamble of claim 7, and according to the invention, this equipment is characterized by the features set forth in the characterizing clause of said claim 7. With this arrangement it is possible to exploit the benefits of the modular-system arrangement set forth in claim 1 and used for making the suction mould.
  • FIGS 1-3 show a corner of a suction mould generally designated 1.
  • the suction mould 1 comprises a plane metal plate 2, along the periphery of which a so-called flushing edge 3 is secured by means of screws 4.
  • the metal plate 2 is perforated by a number of through-going bores 5, preferably with a diameter of 2 mm and having their centres spaced from each other by appr. 8 mm, the moulding surface of said metal sheet 2 being covered by metal wire gauze 6 having 20 apertures per linear centimeter (50-mesh gauze). Both the metal plate 2 and the metal wire gauze 6 are made of stainless steel.
  • Projections generally designated 8 are secured to the metal plate 2 above suitable openings 7, each of said projections consisting of a hollow member 9 of high-density polyethylene, the external surface of which is covered with metal-wire gauze 10.
  • the hollow members 9 are perforated by bores 11, like the bores 5 in the plate 2 having a diameter of 2 mm and preferably having their centres spaced approximately 8 mm apart.
  • the metal-wire gauze 10 is made from stainless steel and has 20 apertures per linear centimeter (50-mesh gauze).
  • the projections 8 are secured to the metal plate 2 by means of screws 12.
  • the projections 8 shown in the drawing all have the same dimensions and the same shape, as they are shaped somewhat like truncated cones with square base and rounded corners. It is, however, to be understood that according to the present invention, the projections 8 may have various dimensions and shapes, such as similar to a truncated cone with a rectangular base and rounded corners, and they may have been selected among a modular system comprising pre-fabricated projections of a relatively small number of types with different dimensions and shapes.
  • a pair of ribs 13 are placed close side-by-side between two of the projections 8.
  • the purpose of these ribs 13 is to produce a recess with a downwardly protruding rib on the surface shaped by the suction mould 1 on the papier-mâché product made on this mould, and to produce a substantially plane raised portion on the opposite surface of the product, said rib and a corresponding raised portion on the next product lying below in a stack of nested papier-mâché products having as their purpose to make it easier to separate stacked products from each other.
  • Figure 4 is a partial sectional view of a region of a pressing mould according to the present invention, adapted for hot-pressing of a dried papier-mâché product made with a suction mould according to the invention.
  • the pressing mould consists of a first mould part generally designated 14 and a second mould part generally designated 15.
  • the first mould part 14 comprises projections 16 of a shape complementary to the shape of the recesses produced in the dried papier-mâché product by the shaping surface of the suction mould
  • the second mould part 15 comprises recesses 17 of a shape complementary to the shape of the projections 16 on the first mould part, but having dimensions greater than the projections 16 on the first mould part enlarged by the wall thickness of the hot-pressed papier-mâché product.
  • Both the projections 16 and the recesses 17 may be produced by suitably machining metallic work pieces.
  • the projection 16 shown in Figure 4 is pre-fabricated and chosen from second modular system comprising a relatively small number of types with different dimensions and shapes corresponding to the dimensions and shapes after shrinkage of the recesses produced in the papier-mâché product using projections according to the first-mentioned modular system described in connection with the suction mould related to with reference to Figures 1-3.
  • the projections 16 on the first mould part 14 are secured to a substantially plane metal plate 18 by means of screws 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paper (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Buffer Packaging (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (7)

  1. Appareil pour la fabrication d'un produit à paroi mince en papier mâché à partir d'un matériau sous forme de pâte et comprenant un moule à aspiration (1), avec des bords d'égalisation (3) et une surface de moulage présentant des parties en saillie (8) et recouvert d'un tissu métallique (6, 10), lesdites parties en saillie présentant une dépouille adéquate permettant une libération aisée du produit moulé du moule à aspiration, dans lequel:
    a) le moule à aspiration (1) comprend une surface de base (2) munie de perforations (5) et recouverte d'un tissu métallique et dans lequel
    b) les parties en saillie (8) sont fixées de façon amovible (12) à la plaque (2) au-dessus d'ouvertures adéquates (7) pratiquées dans la plaque et dans le tissu métallique (6) et sont constituées d'organes creux perforés (9) recouverts extérieurement d'un tissu métallique (10), caractérisé en ce que ladite surface de base est une plaque plane (2) et en ce que lesdites parties en saillie (8) sont choisies parmi un premier système de composants d'assemblage comprenant un nombre relativement faible de types de parties en saillie pré-fabriquées (8) présentant différentes dimensions et formes.
  2. Appareil selon la revendication 1, caractérisé en ce que les parties en saillie (8) présentent des formes similaires à celles de troncs de cône munis d'une base de forme sensiblement carrée ou rectangulaire à angles arrondis, leurs parois périphériques en biais formant un angle de dépouille par rapport à la normale sur la surface de la plaque (2) de l'ordre de 8 à 20°, de préférence d'environ 15°.
  3. Appareil selon la revendication 2, caractérisé en ce que
    a) la plaque (2) et le tissu métallique (6, 10) sont réalisés en acier inoxydable,
    b) les perforations (5, 11) de la plaque (2) et des organes creux (9) sont des trous présentant un diamètre d'environ 2 mm et un entraxe d'environ 8 mm, et en ce que,
    c) le tissu métallique (6, 10) présente environ 20 ouvertures par centimètre linéaire (une maille d'environ 50 mesh).
  4. Appareil selon la revendication 2 ou 3, caractérisé en ce que les organes creux (9) utilisés dans les parties en saillie (8) sont fabriqués par moulage et/ou traitement d'usinage d'un matériau synthétique, tel que nylon, polycarbonate, polyester, etc., de préférence un polyéthylène haute densité.
  5. Appareil selon la revendication 4, caractérisé en ce qu'un recouvrement en tissu métallique (10) sur les parties en saillie (8) est obtenu par un procédé comprenant les étapes consistant :
    a) à créer une surface développée adéquate,
    b) à découper une préforme en tissu métallique d'une forme qui correspond à celle de ladite surface développée;
    c) à plier la préforme pour obtenir la forme recherchée avec soudage électrique par résistance des arêtes, entre elles, afin de maintenir la forme, et
    d) à fixer le profil en tissu métallique, conformé et soudé, à la surface de l'organe creux en matière synthétique (9) par chauffage.
  6. Appareil selon l'une quelconque des revendications 2 à 5, caractérisé par au moins une paire de nervures courtes (13) présentant une dépouille adéquate situées à proximité et l'une à côté de l'autre au-dessus du recouvrement en tissu métallique (6) à au moins un emplacement de la plaque (2), lesdites nervures (13) étant réalisées soit en tissu métallique et fixées au tissu métallique sur la plaque par soudage par points, soit en, par exemple polyéthylène et fixées de façon amovible à la plaque métallique au moyen d'au moins une vis.
  7. Appareil selon l'une quelconque des revendications 1 à 6, et comprenant un moule de compression pour moulage à chaud d'un produit séché en papier mâché réalisé au moyen d'un moule à aspiration selon l'une quelconque des revendications 1 à 6, ledit moule de compression comprenant une première partie de moule (14) muni de pièces en saillie (16) qui sont complémentaires des évidements du produit séché en papier mâché formés par la surface de moulage du moule à aspiration et présentant la même forme et les mêmes dimensions que lesdits évidements, et une deuxième partie de moule (15) munie d'évidements (17) qui sont complémentaires des parties en saillie (6) prévus sur la première partie de moule (14) et présentent la même forme que ces dernières, les dimensions des évidements (17) étant néanmoins augmentées d'une valeur égale à l'épaisseur de paroi (t) du produit en papier mâché moulé à chaud par rapport aux dimensions des parties en saillie (16) prévues sur la première partie de moule (14), et dans lequel les parties en saillie (16) des parties de moule ainsi que les évidements (17) de ces dernières sont obtenues par usinage de pièces métalliques, caractérisé en ce que la première partie de moule (14) a été assemblée avec des parties en saillie indépendantes et préfabriquées (16) choisies dans un deuxième système de composants d'assemblage comprenant un nombre relativement faible de types présentant des dimensions et des formes différentes, correspondant aux dimensions et aux formes, après rétrécissement, des évidements fabriqués dans le produit en papier mâché par l'utilisation des parties en saillie selon le premier système de composants d'assemblage tel que mentionné dans la revendication 1, lesdites premières parties en saillie (16) étant fixées de façon amovible à une base métallique sensiblement plane (8).
EP93905228A 1992-02-28 1993-02-26 Equipement pour la fabrication d'articles a partir d'une pate fibreuse Expired - Lifetime EP0637353B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK026292A DK169084B1 (da) 1992-02-28 1992-02-28 Anlæg til fremstilling af et skalformet papmacheemne af pulpmateriale
DK262/92 1992-02-28
PCT/DK1993/000071 WO1993017183A1 (fr) 1992-02-28 1993-02-26 Equipement pour la fabrication d'articles en fibre vegetale, et moule a aspiration destine a cet equipement

Publications (2)

Publication Number Publication Date
EP0637353A1 EP0637353A1 (fr) 1995-02-08
EP0637353B1 true EP0637353B1 (fr) 1997-01-08

Family

ID=8091558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93905228A Expired - Lifetime EP0637353B1 (fr) 1992-02-28 1993-02-26 Equipement pour la fabrication d'articles a partir d'une pate fibreuse

Country Status (6)

Country Link
EP (1) EP0637353B1 (fr)
AT (1) ATE147449T1 (fr)
AU (1) AU3627793A (fr)
DE (1) DE69307304T2 (fr)
DK (1) DK169084B1 (fr)
WO (1) WO1993017183A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656135A (en) * 1993-02-16 1997-08-12 Moulded Fibre Technology, Inc. Molded product manufacturing apparatus and methods
DK169997B1 (da) * 1993-04-15 1995-04-24 Hartmann As Brdr Modulopbyggede formværktøjer til brug i en maskine til fremstilling af skaller af pulpmateriale
FR2711622B1 (fr) * 1993-10-27 1996-01-12 Anacellulose Elément de protection contre les chocs, procédé de fabrication et dispositif pour la mise en Óoeuvre du procédé.
EP1323857A3 (fr) * 2001-12-25 2005-02-02 Toyoda Boshoku Corporation Non-tissé à trois dimensions, moule utilisé et procédé de fabrication
CN109371762B (zh) * 2018-10-30 2024-05-10 永发（河南）模塑科技发展有限公司 一种纸浆模塑制品及其模具和窄跑道工艺方法
DE102019127562A1 (de) * 2019-10-14 2021-04-15 Kiefel Gmbh Faserformanlage zur herstellung von formteilen aus umweltverträglich abbaubarem fasermaterial
DE102019127559A1 (de) * 2019-10-14 2021-04-15 Kiefel Gmbh Faserformanlage zur herstellung von formteilen aus umweltverträglich abbaubarem fasermaterial

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB627841A (en) * 1945-12-14 1949-08-17 Mapes Cons Mfg Co Dies for molding pulp articles
GB708393A (en) * 1952-01-17 1954-05-05 Mapes Cons Mfg Co Pulp molding dies
US2903062A (en) * 1955-09-16 1959-09-08 Central Fibre Products Company Pulp-molding dies

Also Published As

Publication number Publication date
DE69307304D1 (de) 1997-02-20
ATE147449T1 (de) 1997-01-15
EP0637353A1 (fr) 1995-02-08
DK26292D0 (da) 1992-02-28
AU3627793A (en) 1993-09-13
DK169084B1 (da) 1994-08-08
DK26292A (da) 1993-08-29
WO1993017183A1 (fr) 1993-09-02
DE69307304T2 (de) 1997-05-15

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