EP1127979A1 - Procédé de fabrication d'un panneau de fibres - Google Patents

Procédé de fabrication d'un panneau de fibres Download PDF

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Publication number
EP1127979A1
EP1127979A1 EP00103416A EP00103416A EP1127979A1 EP 1127979 A1 EP1127979 A1 EP 1127979A1 EP 00103416 A EP00103416 A EP 00103416A EP 00103416 A EP00103416 A EP 00103416A EP 1127979 A1 EP1127979 A1 EP 1127979A1
Authority
EP
European Patent Office
Prior art keywords
station
cellulose fiber
molding station
solvent
molding
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Withdrawn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
EP00103416A
Other languages
German (de)
English (en)
Inventor
U. F. M. Schöpf
Jens Richter
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.)
Hofa Homann & Co KG GmbH
Original Assignee
Hofa Homann & Co KG GmbH
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 Hofa Homann & Co KG GmbH filed Critical Hofa Homann & Co KG GmbH
Priority to EP00103416A priority Critical patent/EP1127979A1/fr
Publication of EP1127979A1 publication Critical patent/EP1127979A1/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Withdrawn legal-status Critical Current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
    • D21J1/00—Fibreboard
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines

Definitions

  • the present invention relates to a method for producing molded elements, in particular fiber composite panels, at least one of the components Cellulose fiber flakes, binders and solvents is applied to a molding station and dried.
  • the object of the invention is to provide a method for producing molded parts, in particular composite fiber boards, by means of which lightweight boards with a high-grade mechanical bond can be produced. Furthermore, the invention is intended to propose a novel fiber composite panel.
  • the technical solution to this problem is proposed to improve a generic method in such a way that the at least the components cellulose fiber flakes and solvent are added separately from one another and mixed with one another before being brought out to the forming station during their movement directed towards the forming station.
  • a procedure according to The invention causes the cellulose fiber flakes in completely undirected storage hit the forming station and have no opportunity to even orientations to take. This corresponds to a randomization. Reach through it the plates produced by the method according to the invention a considerable mechanical bond in all directions and can beyond be manufactured with a comparatively low basis weight. According to the invention become the cellulose fiber flakes on the one hand and the solvent on the other fed separately and only shortly before the batch is applied mixed together on the forming station. In an advantageous manner, a high delivery pressure generated, so that the batch practically on the forming station is raised at high speed, so that in the manner described there is no opportunity for the cellulose fiber flakes to align.
  • the binder system is advantageously water-based. So can be a glue or other binder either in the dry state Cellulose fiber flakes or wholly or partly added to the solvent become.
  • the solvent can also be in the form of an aqueous binder system his.
  • the dissolved or isolated cellulose fiber flakes are preferably in a spray process under high pressure and ejected at high speed, be it by an air flow, mechanically, e.g. B. in free fall or the like, driven. They pass through a dispensing nozzle with a nebulizing nozzle in the middle is arranged for the solvent. The flakes pass through the solvent mist, are moistened and then meet for aerodynamic Fleece formation on the forming station where it is disordered, d. H. in a messy Structure during the drying process by the binder Form a network.
  • the fiber flakes can be finished after the fiberizing, for example with fire protection borates, with hydrophodizing agents and the like.
  • the invention proposes that the binder system is dried by hot air flow through the molding station.
  • the fiber composite on a to the forming station to arrange applied nonwoven fabric.
  • This non-woven fabric can be part of the plate will or will remain or be replaced after production.
  • the molding speed or execution conditions can be determined by Suction processes are improved or supported. For this purpose Air is sucked through the forming station so that it is directed towards one Flock flow comes to the forming station.
  • the invention proposes that the side edges of the molded plates.
  • a quantity comparison can be carried out on or after the forming station pressing is also carried out, depending on the application.
  • Others can too Types of fibers are added to the cellulose flakes, all of them conceivable fiber types such as mineral wool fibers, rock wool, glass wool, natural fibers of all kinds, synthetic fibers and the like.
  • other types of fibers can be fed through separate feed paths the batch are introduced, for example through a separate ejection nozzle.
  • Novel shaped elements Manufacture in particular composite fiber boards in which the cellulose fiber flakes in undirected, d. H. randomized arrangement connected with a binder system are.
  • Such plates can be weight-optimized without mechanical Having to give up strength.
  • the invention also provides an apparatus for performing the method proposed comprising at least one ejection station and a blending station above the forming station and a drying unit.
  • the ejection station may include an ejection nozzle and the blending station a Mist nozzle, which is preferably arranged in the blow-out nozzle.
  • It can also Device comprise a unit for generating mechanical pressure to the Apply fiber / solvent mixture.
  • the drying unit can comprise a heating air nozzle arrangement. Also infrared, UV radiation or other drying units can be used.
  • a suction unit can advantageously be arranged under the molding station his. Likewise, devices for pressing and setting a predetermined one Plate thickness may be provided.
  • a side edge molding unit can be in the form of a blower or alternatively Molding units may be provided.
  • the methods and devices proposed by the invention enable the production of a completely new fiber composite panel with optimized properties in terms of weight and mechanical bond.
  • Fig. 1 shows a molding station 1 in which an air-permeable conveyor belt 2 over End-side deflection rollers 3 is moved in the conveying direction 5. At one end it will a nonwoven fabric 4 is placed on the conveyor belt. Via a discharge nozzle 6 with a hose, not shown, for conveying cellulose fiber flakes is, cellulose fibers are pressurized at high speed on the Form station thrown. In the center of the dispensing nozzle 6 there is a nebulizing nozzle 7, which is connected to a line 8 leading to the outside which is a solvent, optionally water, a liquid adhesive preparation or the like is performed.
  • the fogging profile creates a fog, through which the cellulose fiber flakes are blown so that there is a mixing.
  • the cellulose fiber / binder / solvent mixture is then in the direction of the suction side applied to the molding station and promoted in the direction of arrow 5 to dry.
  • a suction funnel 10 is formed below the air-permeable conveyor belt 2, which communicates with a blower 11 and air in the direction of Arrows 12 sucked through the molding station. This measure will Air flow of the feed directed and the impact speed increases.
  • a shaped element 13 is produced, in which chaotic or randomized alignment cellulose fiber flakes 14 arranged and otherwise are connected by a binder system 15. After assembly, you can such plates used for example in construction and the like become. The plates are light and have a considerable mechanical bond strength.
  • the bulk density of the plates produced by the process according to the invention can be less than 70 kg / m 3 .
  • a nonwoven fabric with a permeability of 3000 m 3 / m 2 / h has proven to be suitable.

Landscapes

  • Nonwoven Fabrics (AREA)
EP00103416A 2000-02-25 2000-02-25 Procédé de fabrication d'un panneau de fibres Withdrawn EP1127979A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00103416A EP1127979A1 (fr) 2000-02-25 2000-02-25 Procédé de fabrication d'un panneau de fibres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00103416A EP1127979A1 (fr) 2000-02-25 2000-02-25 Procédé de fabrication d'un panneau de fibres

Publications (1)

Publication Number Publication Date
EP1127979A1 true EP1127979A1 (fr) 2001-08-29

Family

ID=8167885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00103416A Withdrawn EP1127979A1 (fr) 2000-02-25 2000-02-25 Procédé de fabrication d'un panneau de fibres

Country Status (1)

Country Link
EP (1) EP1127979A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL261393A (fr) *
EP0501103A1 (fr) * 1991-02-26 1992-09-02 EURIT BAUELEMENTE GmbH Procédé pour la fabrication de panneaux de fibres liés par hydrosilicate de calcium

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL261393A (fr) *
EP0501103A1 (fr) * 1991-02-26 1992-09-02 EURIT BAUELEMENTE GmbH Procédé pour la fabrication de panneaux de fibres liés par hydrosilicate de calcium

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