EP0499031A1 - Moule et procédé de fabrication de produits à base de laine minérale - Google Patents

Moule et procédé de fabrication de produits à base de laine minérale Download PDF

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Publication number
EP0499031A1
EP0499031A1 EP92100463A EP92100463A EP0499031A1 EP 0499031 A1 EP0499031 A1 EP 0499031A1 EP 92100463 A EP92100463 A EP 92100463A EP 92100463 A EP92100463 A EP 92100463A EP 0499031 A1 EP0499031 A1 EP 0499031A1
Authority
EP
European Patent Office
Prior art keywords
mold
mineral wool
slurry
porous
pore size
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.)
Withdrawn
Application number
EP92100463A
Other languages
German (de)
English (en)
Inventor
Wolfgang Peter Fricker
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.)
Saint Gobain Isover G+H AG
G&H Montage GmbH
Original Assignee
G&H Montage GmbH
Gruenzweig und Hartmann AG
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 G&H Montage GmbH, Gruenzweig und Hartmann AG filed Critical G&H Montage GmbH
Publication of EP0499031A1 publication Critical patent/EP0499031A1/fr
Withdrawn legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/30—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
    • B28B1/38—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/344—Moulds, cores, or mandrels of special material, e.g. destructible materials from absorbent or liquid- or gas-permeable materials, e.g. plaster moulds in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying

Definitions

  • the invention relates to a process for the production of molded parts based on mineral wool, in which mineral wool is disrupted in a slurry and, if appropriate, solid particles are added, a form which is permeable to the liquid of the slurry is immersed in the slurry, on the side of the mold facing away from the slurry, a negative pressure is generated , after a predetermined time, the mold is removed from the slurry and the mineral wool molded part formed is molded out of the mold, and a mold for producing such mineral wool-based molded parts.
  • mineral wool-based molded parts such as sheets for covering objects, shells for sheathing pipes or wedge-shaped or pyramid-shaped sound absorbers, by the vacuum molding process.
  • These molded parts are usually produced from an aqueous slurry of a binder with mineral wool.
  • mineral wool for example, rock wool, glass wool, aluminum silicate wool and the like, as well as combinations thereof can be used as mineral wool.
  • solid particles can also be added to the slurry, as is evident from European application EP-A-0 390 962.
  • Such solid particles can be made of clay, color, carbon in various modifications, thermoplastics, thermosets, acids, bases, metals, Metal oxides, silicones, substances with a high crystal water content and the like exist.
  • molds When carrying out the vacuum molding process for the production of molded parts based on mineral wool from such a slurry of mineral wool, molds are used which are made from a perforated plate or from wire mesh.
  • molds made of perforated sheet metal it has been found, however, that by applying the vacuum to the back of the mold, the slurry or dispersion penetrates into the holes and spreads mushroom-shaped on the back of the mold. This has the consequence that the molded part material claws in the mold after suction and is difficult or impossible to remove from the mold.
  • Forms made of wire mesh behave somewhat more favorably in terms of formability.
  • molds for complicated molded parts can often only be made with difficulty or not at all from wire mesh.
  • molds or a method for producing molded parts of the type mentioned at the outset are now to be specified, with which the disadvantages mentioned can be improved or eliminated.
  • the material for the mold is a porous, permeable material with a medium Pore size or a free passage cross section with a diameter up to 50 microns is used.
  • Permeability is to be understood here as the permeability to liquid from the slurry when a pressure difference is applied.
  • porosity should also be understood here to mean, for example, the labyrinthine design of the structure of laminates.
  • the mold may be expedient to produce the mold from a porous material that has an average pore size up to about 20 ⁇ m.
  • Sintered metals or metal lattice laminates are used as preferred materials for producing such molds.
  • a Disperssbecken 1 is shown schematically filled with a slurry of mineral wool.
  • a diving bell 2 is lowered into this dispersion tank from above.
  • the diving bell has at its lower end an annular flange 3, which can have any shape, such as circular, square or rectangular.
  • the annular flange 5 of an annular holder 6 for a multiple mold 7 is fastened to this annular flange 3 with the aid of screw bolts 4.
  • This multiple mold 7 is continuously connected with its outer edge 8 to the lower edge 9 of the annular holder, so that the multiple mold 7 forms a separating surface between the slurry of mineral wool contained in the dispersion tank 1 and the interior 10 of the diving bell 2.
  • the diving bell has three or more lines 11, 12 and 13 connected to the interior 10 of the diving bell, which lines can be closed via valves, not shown.
  • the line 12 is connected to a device, not shown, for generating a negative pressure in the interior 10.
  • lines 11 and 13 are closed.
  • These latter lines 11 and 13 are connected to devices (not shown) for generating an overpressure in the interior 10 of the suction bell 2.
  • These lines 11 and 13 are only opened after Closure of line 12.
  • the multiple mold 7 consists of several individual molds 20 to 27 for the formation of so-called wedge-shaped sound absorbers, such as are used for the lining of anechoic rooms.
  • Each shape, such as shape 25, consists of lateral shaped surfaces 35 and 45 which are perpendicular to the plane of the drawing and are connected to one another along their upper edge 55.
  • the surfaces 35 and 45 are congruent to one another and preferably have the shape of a trapezoid with their longer edge at the lower ends 65 and 75, respectively.
  • the surfaces 35 and 45 can also be square surfaces.
  • the surfaces 35 and 45 are covered at their edges lying behind the drawing plane or in front of the drawing plane by corresponding triangular surfaces which are connected to one another along the edges of the surfaces 35, 45 along their edges running from 65 to 55 and from 75 to 55.
  • the result is approximately the shape of a hollow wedge, which is open at its base 85.
  • the entire surfaces forming the wedge, of which only the surfaces 35 and 45 can be seen from FIG. 1, are formed from plates made of a microporous material. Such materials have proven to be usable as materials which have a porosity permeable to the liquid of the slurry with an average pore size or a free passage cross section with a diameter of less than about 50 ⁇ m. Sintered metals or metal grid laminates have proven to be extremely suitable for this.
  • Both board thicknesses of 1 mm and 0.5 mm were processed.
  • the particular advantage of these materials is that the plates can be cut to the shape of the surfaces 35 and 45 and welded or soldered to one another at their abutting edges 55 and along the other edges of the surfaces from the same material. No further brackets are required or sealing for said surfaces 35 and 45.
  • the advantage of the embodiment shown in FIG. 1 is that a plurality of such molds 25 are also welded or soldered at their abutting lower edges, such as edges 65 and 75, to the lower edges of the other adjacent molds 24 and 26, respectively can.
  • the multiple form is only shown in a longitudinal section. In a direction perpendicular to this, about 8 identical wedges can also be arranged next to one another in a rectangular retaining ring 6, so that there is a total of 64 wedges.
  • the number of shapes in a multiple shape can be arbitrary. This multiple form practically forms a separating membrane between the liquid on the one hand and the solids contained in the slurry on the other.
  • the vacuum suction process known per se works as follows: By closing the valves to the lines 11 and 13, the diving bell 2 in the state shown in FIG. 1 is immersed from above into the slurry in the dispersion tank 1, so that practically the entire surface of the side of the multiple mold 7 facing the dispersion tank is included Slurry is covered. A negative pressure is then generated via the line 12 in the interior 10 of the diving bell 2, as a result of which liquid is sucked out of the dispersion phase into the interior of the diving bell and via the line 12. The fibers contained in the dispersion, the binder and optionally the added solid particles are practically by the Multiple form 7 held back.
  • the wedge-shaped spaces of the multiple mold 7 increasingly fill with the solids from the slurry, with the arrows A and B indicating the material transport from the slurry.
  • the diving bell is lifted out of the dispersion pool again and pivoted to a settling surface located outside the pool.
  • the multiple shape it is now only necessary to close the vacuum line 12 and to give an overpressure into the interior 10 of the diving bell via lines 11 and 13, the shape of which is such that a medium distribution (air / steam) is ensured.
  • Distribution stars 14 are arranged for air distribution.
  • the multiple form shown can only be properly formed by applying the overpressure.
  • the multiple mold shown which was made of, for example, metal grid laminate with a thickness of 1.5 mm, has proven to be extremely dimensionally stable. Surprisingly, the process time required to fill the multiple mold with the solid particles from the slurry was shorter than that of the previously known processes. The main advantage overall, however, was that the molding could only be carried out with the aid of an overpressure, without the need for further mechanical interventions during molding, and without a committee being obtained.
  • FIG. 2 shows an example of a single mold for producing a pyramid-shaped sound absorber element made of mineral wool.
  • the shape has a square mounting flange 100, which can be attached to the flange 4 of a diving bell, for example, if this flange has a corresponding square shape or a transition.
  • the edges 111, 121, 131 and 141 are connected by triangular side surfaces 110, 120, 130 and 140 to this fastening flange 100, which can be made of any suitable, not necessarily porous material.
  • These congruent side surfaces have dimensions such that they form the sides of a pyramid, the tip of which lies 150 in front of the plane of the drawing.
  • the side surfaces are connected to one another along their further free edges, so that the ribs 112, 122, 132 and 142 form, which converge in the tip 150.
  • the side surfaces 110, 120, 130 and 140 are each made from plate-shaped parts of a porous material, such as sintered metal. These surfaces were then welded or soldered together along their abutting edges and along the edges common to the mounting flange 100.
  • a corresponding pyramid-shaped sound absorber made of mineral wool is produced in the same way as described in connection with FIG. 1.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Producing Shaped Articles From Materials (AREA)
EP92100463A 1991-02-14 1992-01-13 Moule et procédé de fabrication de produits à base de laine minérale Withdrawn EP0499031A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914104549 DE4104549A1 (de) 1991-02-14 1991-02-14 Form und verfahren zum herstellen von formteilen auf mineralwollebasis
DE4104549 1991-02-14

Publications (1)

Publication Number Publication Date
EP0499031A1 true EP0499031A1 (fr) 1992-08-19

Family

ID=6425061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100463A Withdrawn EP0499031A1 (fr) 1991-02-14 1992-01-13 Moule et procédé de fabrication de produits à base de laine minérale

Country Status (3)

Country Link
EP (1) EP0499031A1 (fr)
JP (1) JPH04361002A (fr)
DE (1) DE4104549A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0731214A2 (fr) * 1995-03-07 1996-09-11 Rexam Corrugated South West Limited Objets moulés en pâte à papier
ITFI20110107A1 (it) * 2011-05-24 2012-11-25 Longinotti Group S R L Apparato per la produzione di mattonelle.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH114111A (de) * 1925-03-09 1926-03-01 Corp Seaman Container Mfg Verfahren und Maschine zur Herstellung von nahtlosen Behältern aus verfilztem Faserstoff.
DE619120C (de) * 1932-08-05 1935-09-26 Jesse Barnum Hawley Verfahren zur Herstellung von Lampenschirmen
GB661780A (en) * 1949-03-28 1951-11-28 Sintered Products Ltd Improvements in or relating to moulds
FR1162583A (fr) * 1956-06-19 1958-09-15 Procédé et dispositif pour fabriquer des objets en amiante-ciment et articles ainsi obtenus
US2923353A (en) * 1958-01-28 1960-02-02 Diamond National Corp Metal sandwich mold
US3275213A (en) * 1964-03-18 1966-09-27 Diamond Int Corp Controlled stock formation
FR2201647A5 (fr) * 1972-10-04 1974-04-26 Everitube
GB2074085A (en) * 1980-03-19 1981-10-28 Telford Safety Glove Co Ltd Moulding fibrous gloves

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH114111A (de) * 1925-03-09 1926-03-01 Corp Seaman Container Mfg Verfahren und Maschine zur Herstellung von nahtlosen Behältern aus verfilztem Faserstoff.
DE619120C (de) * 1932-08-05 1935-09-26 Jesse Barnum Hawley Verfahren zur Herstellung von Lampenschirmen
GB661780A (en) * 1949-03-28 1951-11-28 Sintered Products Ltd Improvements in or relating to moulds
FR1162583A (fr) * 1956-06-19 1958-09-15 Procédé et dispositif pour fabriquer des objets en amiante-ciment et articles ainsi obtenus
US2923353A (en) * 1958-01-28 1960-02-02 Diamond National Corp Metal sandwich mold
US3275213A (en) * 1964-03-18 1966-09-27 Diamond Int Corp Controlled stock formation
FR2201647A5 (fr) * 1972-10-04 1974-04-26 Everitube
GB2074085A (en) * 1980-03-19 1981-10-28 Telford Safety Glove Co Ltd Moulding fibrous gloves

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GLASS AND CERAMICS Bd. 41, Nr. 5/6, Mai 1984, NEW-YORK Seiten 238 - 240; V. M. KAPTSEVICH: 'POROUS METAL MOLDS FOR PLASTIC FORMING OF CERAMIC PARTS' *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0731214A2 (fr) * 1995-03-07 1996-09-11 Rexam Corrugated South West Limited Objets moulés en pâte à papier
EP0731214A3 (fr) * 1995-03-07 1997-07-02 Rexam Corrugated South West Li Objets moulés en pâte à papier
ITFI20110107A1 (it) * 2011-05-24 2012-11-25 Longinotti Group S R L Apparato per la produzione di mattonelle.
WO2012160583A1 (fr) * 2011-05-24 2012-11-29 Longinotti Group S.R.L. Appareil pour fabriquer des carreaux

Also Published As

Publication number Publication date
DE4104549A1 (de) 1992-08-20
JPH04361002A (ja) 1992-12-14

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