EP0637353B1 - Einrichtung zur herstellung von formkörpern aus faserbrei - Google Patents

Einrichtung zur herstellung von formkörpern aus faserbrei 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
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English (en)
French (fr)
Other versions
EP0637353A1 (de
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.)
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Publication date
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Application filed by Brodrene Hartmann AS filed Critical Brodrene Hartmann AS
Publication of EP0637353A1 publication Critical patent/EP0637353A1/de
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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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Buffer Packaging (AREA)

Claims (7)

  1. Anlage zur Herstellung dünnwandiger Papmaché-Gegenstände aus Pulpmaterial, bestehend aus einer mit Spülkanten (3) versehenen Saugform (1) und einer formgebenden, mit Vorsprüngen (8) versehenen und mit einem Drahtgewebe (6,10) bekleideten Oberfläche, wobei die Vorsprünge einen passenden Schlupfwinkel aufweisen, der eine problemfreie Befreiung des geformten Gegenstandes von der Saugform ermöglicht, indem
    a) die Saugform (1) eine Grundfläche (2) aufweist, die mit Durchbrechungen (5) versehen und mit einem Drahtgewebe bekleidet ist, und
    b) die Vorsprünge (8) lösbar (12) an der Fläche (2) über in letzterer und in dem Drahtgewebe (6) vorgesehenen passenden Öffnungen (7) befestigt sind und aus durchbrochenen, auf ihrer Aussenseite mit einem Drahtgewebe bekleideten Hohlkörpern (9) bestehen, dadurch gekennzeichnet, dass die Grundfläche eine ebene Platte (2) ist, und dass die genannten Vorsprünge (8) aus einem ersten Bausatz-System ausgewählt sind, welches eine verhältnismässig geringe Anzahl von vorgefertigten Typen von Vorsprüngen (8) mit verschiedenen Abmessungen und Formen aufweist.
  2. Anlage gemäss Anspruch 1, dadurch gekennzeichnet, dass die Vorsprünge (8) Formen aufweisen, die der von Kegelstumpfen gleichen, mit einer im Wesentlichen quadratischen oder rechtwinkligen Grundfläche mit abgerundeten Ecken, und dass ihre schrägen Periferiewände einen Schlupfwinkel mit der auf die Oberfläche der Platte (2) bezogenen Senkrechten bilden in einer Grössenordnung von 8-200, vorzugsweise etwa 15°.
  3. Anlage gemäss Anspruch 2, dadurch gekennzeichnet, dass
    a) die Platte (2) und das Drahtgewebe (6,10) aus nichtrostendem Stahl bestehen,
    b) die Durchbrechungen (5,11) in der Platte (2) und den Hohlkörpern (9) Löcher mit einem Durchmesser von etwa 2 mm und einem Mittenabstand von vorzugsweise etwa 8 mm sind, sowie dass
    c) das Drahtgewebe (6,10) etwa 20 Öffnungen per linearem Zentimeter (eine Maschengrösse von etwa 50) aufweist.
  4. Anlage gemäss Anspruch 2 oder 3, dadurch gekennzeichnet, dass die in den Vorsprüngen (8) angewandten Hohlkörper (9) durch Giessen und/oder materialentfernende Bearbeitung eines Plastmaterials wie Nylon, Polykarbonat, Polyester etc., vorzugsweise Polyethylen hoher Dichte hergestellt sind.
  5. Anlage gemäss Anspruch 4, dadurch gekennzeichnet, dass eine Metalldrahtgewebe-Bekleidung (10) auf den Vorsprüngen (8) hergestellt worden ist durch ein die folgenden Schritte enthaltendes Verfahren:
    a) Herstellung einer passend entfalteten Oberfläche,
    b) Zuschneiden einer Vorform aus Metalldrahtgewebe mit einer der entfalteten Oberfläche entsprechenden Form,
    c) Falten dieser Vorform in die gewünschte Form, und Widerstands-verschweissen von deren Kanten aneinander zwecks Bewahrung der Form, und
    d) Befestigung des geformten und verschweissten Draht-Formgewebes an die Oberfläche des hohlen Plastkörpers (9) durch Erwärmung.
  6. Anlage gemäss einem jeden, oder jede der Ansprüche 2-5, dadurch gekennzeichnet, dass zumindest ein Paar kurzer Rippen (13) mit passenden Schlupf dicht Seite an Seite auf der Spitze der Drahtgewebe-Bekleidung (6) auf mindestens einer Stelle der Platte (2) angebracht ist, welche Rippen (13) entweder aus Metalldrahtgewebe hergestellt und an einem Metalldrahtgewebe auf der Platte durch Punktschweissen befestigt sind, oder beispielsweise aus Polyethylen hergestellt und entfernbar auf der Metallplatte mittels mindestens einer Schraube befestigt sind.
  7. Anlage gemäss einem jeden der Ansprüche 1-6, bestehend aus einer Press-Form zum Warm-Pressen des mittels einer Saugform hergestellten, getrockneten Papmaché-Gegenstandes wie in einem jeden der Ansprüche 1-6 angegeben, wobei die Pressform einen ersten Formteil (14) mit Vorsprüngen (16) entsprechend den Vertiefungen in dem getrockneten, mittels der formgebenden Oberfläche der Saugform hergestellten Papmaché-Gegenstand enthält und die gleiche Form und die gleichen Abmessungen wie die Vertiefungen aufweist, sowie einen zweiten Formteil (15) mit entsprechend den Vorsprüngen (16) auf dem ersten Formteil (14) enthält sowie die gleiche Form wie letztere aufweist, wobei indessen die Dimensionen der Vertiefungen (17) um die Wanddicke (t) des warm-gepressten Papmaché-Gegenstandes entsprechend den Abmessungen der Vorsprünge (16) auf dem ersten Formteil (14) vergrössert sind, und wo die Vorsprünge (16) auf, und die Vertiefungen (17) in den Formteilen durch materialentfernende Bearbeitung von Metallwerkstücken hergestellt sind, dadurch gekennzeichnet, dass der erste Formteil (14) mittels separater, vorgefertigter Vorsprünge (16) aufgebaut ist, die aus einem zweiten Bausatz-System ausgewählt sind, das eine verhältnismässig kleine Anzahl von Typen unterschiedlicher Abmessungen und Formen umfasst, die den Abmessungen und Formen nach Schrumpfen der in dem Papmaché-Gegenstand hergestellten Vertiefungen unter Anwendung von Vorsprüngen gemäss dem ersten Bausatz-System wie in Anspruch 1 angegeben entspricht, und dass die genannten ersten Vorsprünge (16) lösbar an einer im Wesentlichen ebenen Metallunterlage (8) befestigt sind.
EP93905228A 1992-02-28 1993-02-26 Einrichtung zur herstellung von formkörpern aus faserbrei Expired - Lifetime EP0637353B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK262/92 1992-02-28
DK026292A DK169084B1 (da) 1992-02-28 1992-02-28 Anlæg til fremstilling af et skalformet papmacheemne af pulpmateriale
PCT/DK1993/000071 WO1993017183A1 (en) 1992-02-28 1993-02-26 Equipment for making articles from pulp material, and suction mould for use in such equipment

Publications (2)

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

Family

ID=8091558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93905228A Expired - Lifetime EP0637353B1 (de) 1992-02-28 1993-02-26 Einrichtung zur herstellung von formkörpern aus faserbrei

Country Status (6)

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

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 (de) * 2001-12-25 2005-02-02 Toyoda Boshoku Corporation Dreidimensionaler Vliesstoff, verwendete Form und Verfahren zur Herstellung
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
DE102019127559A1 (de) * 2019-10-14 2021-04-15 Kiefel Gmbh Faserformanlage zur herstellung von formteilen aus umweltverträglich abbaubarem fasermaterial
DE102019127562A1 (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
DK169084B1 (da) 1994-08-08
DE69307304D1 (de) 1997-02-20
DK26292D0 (da) 1992-02-28
WO1993017183A1 (en) 1993-09-02
EP0637353A1 (de) 1995-02-08
AU3627793A (en) 1993-09-13
DE69307304T2 (de) 1997-05-15
ATE147449T1 (de) 1997-01-15
DK26292A (da) 1993-08-29

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