EP0432598B1 - Procédé et dispositif pour le moulage par compression d'articles formés en particules végétales - Google Patents

Procédé et dispositif pour le moulage par compression d'articles formés en particules végétales Download PDF

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Publication number
EP0432598B1
EP0432598B1 EP90123047A EP90123047A EP0432598B1 EP 0432598 B1 EP0432598 B1 EP 0432598B1 EP 90123047 A EP90123047 A EP 90123047A EP 90123047 A EP90123047 A EP 90123047A EP 0432598 B1 EP0432598 B1 EP 0432598B1
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EP
European Patent Office
Prior art keywords
pressing
shaped body
station
row
dies
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
EP90123047A
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German (de)
English (en)
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EP0432598A3 (en
EP0432598A2 (fr
Inventor
Franz Winterer
Wilhelm Nagl
Xaver Spies
Franz M. Heggenstaller
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Anton Heggenstaller GmbH
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Anton Heggenstaller 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.)
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Publication date
Application filed by Anton Heggenstaller GmbH filed Critical Anton Heggenstaller GmbH
Priority to AT90123047T priority Critical patent/ATE101353T1/de
Publication of EP0432598A2 publication Critical patent/EP0432598A2/fr
Publication of EP0432598A3 publication Critical patent/EP0432598A3/de
Application granted granted Critical
Publication of EP0432598B1 publication Critical patent/EP0432598B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N5/00—Manufacture of non-flat articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/007—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a plurality of pressing members working in different directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/027—Particular press methods or systems

Definitions

  • the invention relates to methods and devices for compression molding profiles, bars, moldings or the like from small vegetable parts mixed with binders, in particular small wooden parts according to the preamble of claims 1, 6 and 10.
  • the main aim is to produce pallet foot bars or rigid beams in the form of an I, U, Z, L profile and the like.
  • the invention is based on the last-mentioned prior art and sets itself the task of achieving greater productivity with reduced design complexity.
  • the invention provides that the final pressing of the molded body blanks takes place between a series of pressing jaws, one pressing side of which is designed as a male and the other pressing side as a female mold, and that these alternately consist of pressing jaws and molded bodies in the manner of an extrusion process is passed through a heated curing channel.
  • the finished molded articles are covered on two opposite sides by the press jaws and clamped between them.
  • the other two sides as well as the end faces of the molded bodies slide along the heated walls of the hardening channel and undergo hardening there like the strand in an extrusion press.
  • no structural effort is required for this measure according to the invention, as is still essential in the subject of DE-A-33 07 557.
  • DE-A-19 03 975 It is known from DE-A-19 03 975 to form a row of pressed molded bodies and intermediate pieces serving as a pressing tool and to guide this row through a curing channel.
  • the intermediate piece is inserted into a molding press and locked there, whereupon the filled mixture of small wooden parts and binder is compressed against the intermediate piece with the aid of press punches.
  • the intermediate piece therefore has the shape of a matrix only on one side, whereas the back is flat and therefore does not form the spatial shape of a male. Consequently, the shaped body is not pressed between two intermediate pieces, quite apart from the fact that no pre-pressing of the shaped body takes place in this prior art.
  • DE-A-19 03 975 is therefore unable to provide any suggestions for solving the problem posed by the invention.
  • the shaped body blank is already precompressed step by step from different directions in the pre-pressing step and finish-pressed in the main pressing step only in and against the conveying direction, based on the hardening.
  • the pre-pressing technique according to the invention has the advantage that the molded blank produced in this way can be transferred more easily from the pre-pressing station to the main pressing station, quite apart from the fact that the pre-pressing process according to the invention is better in terms of timing Main press can be adjusted.
  • press jaws with the molded bodies clamped between them are guided through the curing channel according to the invention, it is advisable to lock adjacent press jaws with constant spacing. This can be done, for example, in such a way that the press jaws are connected to one another at the end by tabs or engage in conveying means which determine and maintain the distance between the press jaws. This prevents the press jaws from being able to shift relative to one another during passage through the curing device.
  • Another essential process step of the invention is that the pressure generators acting on the press jaws form the press pressure in a first stage and in a second stage the row formed from press jaws and moldings in cycles by the sum of the height of a press jaw and a molded body through the curing channel push.
  • the invention provides in a preferred embodiment that the pre-pressed blank is alternately fed to one of two main pressing stations adjacent to the pre-pressing station. With this measure, a particularly favorable productivity of the structurally relatively simple system is achieved.
  • the device claims 6 to 16 list numerous features of the invention with regard to the appropriate design of a molding press for carrying out the method according to the invention.
  • Decisive here is the design of the individual press jaws of a main press station, which is designed as a male part on one press side and as a female part on its opposite press side. This creates the possibility of a variety to guide press jaws of this type with pressed molded bodies located therebetween in a row through a curing channel, without having to make any particular design efforts.
  • finite moldings of any kind can be produced, which are characterized by a high and constant dimensional stability and great strength.
  • the invention also offers the possibility of producing elongated frame profiles, for example for door frames, which are superior to conventional natural products in terms of strength, dimensional stability and weather resistance.
  • the invention also offers the possibility of producing finished end products, for example railing rods, railing runs and the like.
  • FIG. 1 shows a pre-pressing room (1) in a pre-pressing station (3), which is filled in the usual way with a mixture of small parts (2).
  • This press space is essentially enclosed by paired opposing and mutually movable pre-pressing jaws (4 to 7) and by wall areas of the pre-pressing station (3) on which the pre-pressing jaws (4 to 7) are guided.
  • the side pre-pressing jaws (6, 7) are movable along a guide channel (8). Their pressing surfaces are flush with the guide surfaces for the upper and lower pre-pressing jaws (4, 5) in the position according to FIG. 1.
  • the upper pre-pressing jaw (4) is moved from the starting position according to FIG. 1 into the position according to FIG. 2, while the other pre-pressing jaws (5, 6, 7) are held in their position and thus form an initially rigid mold wall.
  • the end position of the upper pre-pressing jaw (4) is flush with the wall of the guide channel (8).
  • the next step is a pressing process by the lower pre-pressing jaw (5) from the position according to FIG. 2 to the position according to FIG. 3, while the other pre-pressing jaws (4, 6, 7) are held in place and thus form rigid mold walls.
  • the end position of the lower pre-pressing jaw (5) according to FIG. 3 is aligned with the guide channel (8).
  • the last pressing process in the pre-pressing station (3) consists in that the lateral pre-pressing jaws (6, 7) are moved towards each other and move from the position according to FIG. 3 into that according to FIG.
  • the molded blank (9) pre-pressed in this way is shown in FIG. 5 alone. In this form, it is conveyed into the area of a main press station, as shown in FIG. 6 in the exemplary embodiment.
  • the guide channel (8), in which the lateral pre-pressing jaws (6, 7) move, is a suitable conveying path. Therefore, these side pre-pressing jaws (6, 7) can also be used for transversely displacing the shaped body blank (9) along the guide channel (8).
  • a molding press is shown in vertical section, in which the main pressing directions extend vertically.
  • the invention is not limited to this because the same principle of the invention can also be used, for example, in horizontally acting molding presses.
  • the mixture of small parts mixed with binder is fed via a conveyor belt (11) to a filling funnel (12) which is arranged on a sliding frame (13) which is driven to move horizontally back and forth in the direction of the arrow.
  • a pressure generator (10) is also attached to this sliding frame (13) and moves the upper pre-pressing jaws (4) of the pre-pressing station (3).
  • the sliding frame (13) In order to fill the pre-press chamber (1) (compare FIG. 1) with the mixture of small parts (2), the sliding frame (13) is moved to the right until the outlet opening of the filling funnel (12) comes to lie above the pre-press chamber (1).
  • the upper pre-pressing jaws (4) and the pressure generator (10) are accordingly located away from the pre-pressing space (1).
  • the sliding frame (13) is moved back into the position shown in FIG. 6, so that the upper pre-pressing jaw (4) can now be moved by the pressure generator (10) in the sense of the statements relating to FIGS. 1 and 2.
  • the finished molded blank (9) then has a cross section that corresponds to that of the guide channel (8), so that the blank (9) can be pushed laterally from the pre-pressing station (3) into the main pressing station (14).
  • two such main pressing stations (14) are shown to the side of the pre-pressing station (3). Accordingly, there are two pairs of pre-press jaws (6, 7), of which one pair of pre-press jaws (6, 7) is assigned to the pre-press station (3) and the other pair of pre-press jaws (5, 6) is assigned to one of the two main press stations (14).
  • Both pairs of pre-press jaws (6, 7) are moved laterally together, so that the single molded body blank (9) can be fed alternately to one and then the other main press station (14) without unnecessary return of the lateral movement of the pre-press jaw pairs (5, 6 ) takes place.
  • a vertical row (19) is now formed in the individual main press station (14), consisting of press jaws (17) and molded bodies (18) located between them.
  • the individual pressing jaws (17) can be brought into a position aligned with the row (19).
  • FIG. 6 it is shown how a shaped body blank (9) is being brought into the pressing position while a pressing jaw (17) has been moved above the shaped body blank (9) under an upper pressure generator (15) .
  • a press jaw (17) which is already immersed in a hardening channel (20) which, in the example, is formed by steel walls (22) which is a heating device, for example in the form of channels for liquid heating means exhibit.
  • the curing channel (20) is protected from the outside by the insulation (21).
  • Another pressure generator engages against the underside of the row of press jaws (19) (16).
  • a single press stroke is carried out via the upper pressure generator (15), which is applied to the press jaw (17) resting on the pressure generator (15) and thus to the molded body blank ( 9) works.
  • the lower pressure generator (16) merely forms a counterforce without executing a stroke.
  • the shaped body blank (9) is pressed into the final shape between the adjacent pressing jaws (17) and the lateral pre-pressing jaws (6, 7) held in position, the pressing jaws (17) located below the shaped body blank (9). form a kind of anvil.
  • both pressure generators (15, 16) perform a common movement downwards, the size of which corresponds to the height of a press jaw (17) plus the height of the finished molded body (18) adjoining it. This ensures that the surface of the upper press jaw (17) facing the upper pressure generator (15) comes to lie flush with the lower surface of the guide channel (8), so that the lateral pre-press jaws (6, 7) come back into position Prepress station (3) can return.
  • each pressing surface of each pressing jaw (17) has the shape of a male mold (28) and the other pressing surface has the shape of a female mold (29).
  • the design of these pressing surfaces depends on the spatial shape of the molded body (18) to be formed.
  • a hardened molded body (18) passes the lower end of the hardening channel (20), it is temporarily held by a holding device (26) and transferred to a transfer table (27) while the upper pressure generator (15) is at a standstill, from where the finished molded body ( 18) can be fed to a conveyor belt (25).
  • the press jaw (17) located at the bottom is laterally guided away from the lower pressure generator (16) and into the region of a conveying channel (24) in which the press jaw (17) can again reach the guide (23) and thus the main press station (14) .
  • an elongated strip profile is formed as the shaped body (18), which can preferably be used for the production of frames, for example door frames.
  • the side of the pressing jaw (17) designed as a male part (28) has a plurality of raised webs (30) which extend continuously in the profile direction and which have the task of inserting corresponding grooves and raised beads located between them in the associated side of the molded body (18) (32) to form.
  • the side of the individual press jaw (17) designed as a die (29) has a continuous groove-like depression (31) to form a strip-shaped extension (33). This approach (33) and the raised beads (32) or the channels located between them ensure that the finished molded body (18) remains dimensionally stable even under external influences and does not bend or twist.
  • male (28) and female (29) can be designed as desired, depending on the spatial shape of the molded body (18) to be formed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Cultivation Of Plants (AREA)
  • Fertilizers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Processing Of Solid Wastes (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Claims (11)

  1. Procédé pour mouler par compression des profilés, des traverses, des pièces de forme (18) ou analogues, formées de particules végétales (2), notamment de particules de bois, mélangées a un liant, selon lequel lors d'une opération de compression préliminaire, on forme tout d'abord une ébauche (9) de la pièce de forme, on amène cette ébauche dans un poste de compression principale (14) et, en cet endroit, on la comprime entre des mâchoires de compression mobiles (17) pour l'amener à sa forme définitive et on la fait durcir par action thermique tout en maintenant la compression conjointement avec les mâchoires de compression (17), caractérisé par le fait qu'on exécute la compression finale des ébauches (9) des pièces de forme entre des mâchoires de compression (17) formant une rangée (19) et dont une face de compression est agencée sous la forme d'un poinçon (28) et dont l'autre face de compression est agencée sous la forme d'une matrice (29), et que cette rangée (19) constituée alternativement de deux mâchoires de compression (17) et de pièces de forme (18), est guidée comme dans le cas d'un processus d'extrusion, dans un canal chauffé de durcissement (20).
  2. Procédé suivant la revendication 1, caractérisé par le fait que l'ébauche (9) de la pièce de forme est prédensifiée de façon échelonnée dans des directions différentes lors de l'opération de précompression, et, lors de l'opération de compression principale, est soumise à une compression finale, lors de l'opération de compression principale, uniquement dans la direction d'entraînement et en sens opposé à cette direction, par rapport au durcissement.
  3. Procédé suivant la revendication 1 ou 2, caractérisé par le fait que les mâchoires de compression voisines (9) sont verrouillées pendant le durcissement de manière à être séparées par une distance constante.
  4. Procédé suivant l'une des revendications 1 à 3, caractérisé par le fait que les générateurs de pression (15,16) qui agissent sur les mâchoires de compression (17), établissent la pression de compression, lors d'une première étape, et, lors d'une seconde étape, déplacent de façon cadencée la série (19) formée des mâchoires de compression (17) et des pièces de forme (18), respectivement sur une distance égale à la somme de la hauteur d'une mâchoire de compression (17) ainsi que d'une pièce de forme contiguë (18), dans le canal de durcissement (20).
  5. Procédé suivant l'une des revendications 1 à 4, caractérisé par le fait que l'ébauche précomprimée (9) de la pièce de forme est envoyée alternativement à l'un de deux postes de compression principale voisins du poste de précompression (3).
  6. Dispositif pour la mise en oeuvre du procédé suivant l'une des revendications 1 à 5, constitué par une presse de moulage comportant un poste de précompression et au moins un poste de compression principale (14) ainsi que des mâchoires de compression (17) mobiles et guidées, qui peuvent être déplacées, avec la pièce de forme (18) située entre ces mâchoires, à partir du poste de compression principale (14) dans un canal de durcissement (20), et qui peuvent être renvoyées au poste de compression principale (14), en étant séparées de la pièce de forme (18) terminée, caractérisé par le fait que des guides parallèles (8,23) prévus pour les ébauches (9) de pièces de forme et pour les mâchoires de compression (17) débouchent dans le poste de compression principale (14), pour la formation d'une série (19) de pièces de forme (18) et de mâchoires de compression (17), disposées de façon alternée et qu'il est prévu des générateurs de pression (15,16) qui agissent des deux côtés sur la série (19).
  7. Dispositif suivant la revendication 6, caractérisé par le fait que les guides (8,23) sont disposés en étant décalés réciproquement en hauteur de sorte que le guide (8) pour les ébauches (9) des pièces de forme est situé dans un plan inférieur et le guide (23) pour les machoires de compression (17) est situé dans un plan plus élevé, les guides (8,23) débouchant à partir de côtés réciproquement opposés, dans le poste de compression principale (14).
  8. Dispositif suivant la revendication 6 ou 7, caractérisé par le fait qu'en plus du poste de précompression (3), il est prévu deux postes de compression principaux (14), auxquels peuvent être envoyées alternativement les ébauches précomprimées (9) de pièces de forme.
  9. Dispositif suivant l'une des revendications 6 à 8, caractérisé par le fait que les générateurs de pression (15,16), qui agissent sur la série individuelle (19) de mâchoires de compression du poste de compression principale (14), sont branchés de manière à former deux étages, dans le premier desquels un générateur de pression (15) exécute la course de compression et l'autre générateur de pression (16) produit une force antagoniste sans aucune course, tandis que dans le second étage, les deux générateurs de pression (15,16) se déplacent sur des courses de déplacement dans le même sens de manière à déplacer la série (19) dans le canal de durcissement (20).
  10. Dispositif pour la mise en oeuvre du procédé suivant l'une des revendications 1 à 5, constitué par deux ou plusieurs mâchoires de compression (17), qui peuvent être déplacées, avec les pièces de forme (18) enserrées entre les mâchoires de compression, à travers un canal de durcissement (20), caractérisé par le fait que la mâchoire individuelle de compression (17) est agencée, sur sa face de compression, sous la forme d'un poinçon (28), et sur sa face opposée, sous la forme d'une matrice (29), par rapport à la forme spatiale de la pièce de forme (18) à comprimer.
  11. Dispositif suivant la revendication 10, caractérisé par le fait que les mâchoires de compression (17) peuvent être réunies entre elles au moyen d'éléments de retenue servant à maintenir constantes leur distance réciproque.
EP90123047A 1989-12-13 1990-12-01 Procédé et dispositif pour le moulage par compression d'articles formés en particules végétales Expired - Lifetime EP0432598B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90123047T ATE101353T1 (de) 1989-12-13 1990-12-01 Verfahren und vorrichtung zum formpressen von formkoerpern aus pflanzlichen kleinteilen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3941170 1989-12-13
DE3941170A DE3941170A1 (de) 1989-12-13 1989-12-13 Verfahren und vorrichtung zum formpressen von formkoerpern aus pflanzlichen kleinteilen

Publications (3)

Publication Number Publication Date
EP0432598A2 EP0432598A2 (fr) 1991-06-19
EP0432598A3 EP0432598A3 (en) 1991-10-16
EP0432598B1 true EP0432598B1 (fr) 1994-02-09

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EP90123047A Expired - Lifetime EP0432598B1 (fr) 1989-12-13 1990-12-01 Procédé et dispositif pour le moulage par compression d'articles formés en particules végétales

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Country Link
EP (1) EP0432598B1 (fr)
AT (1) ATE101353T1 (fr)
DE (2) DE3941170A1 (fr)
DK (1) DK0432598T3 (fr)
NO (1) NO904474L (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006015766A1 (de) * 2006-04-04 2007-10-18 Dorst Technologies Gmbh & Co. Kg Pressverfahren und Pressenvorrichtung zum Pressen eines Pressteils

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US1374173A (en) * 1920-06-01 1921-04-12 Andrews Marcus Peytan Brickmaking apparatus
DE475859C (de) * 1927-12-11 1929-05-06 Emil Teltschik & Co Herstellung von steinholzartigen Kunststeinmassen
DE1816078U (de) * 1960-04-27 1960-08-04 Hugo Pfeifer Baustein.
US3933968A (en) * 1968-01-29 1976-01-20 Pierre Sorbier Method of moulding articles from a paste like material
FR95386E (fr) * 1968-01-29 1970-09-11 Sorbier Pierre Perfectionnements aux presses pour le moulage d'objets en bois aggloméré et objets obtenus par moulage sur une telle presse.
FR2337622A1 (fr) * 1976-01-09 1977-08-05 Anvar Procede de moulage d'objets en particules agglomerees et dispositif pour la mise en oeuvre de ce procede
DE2702475A1 (de) * 1977-01-21 1978-07-27 Dieffenbacher Gmbh Maschf Verfahren und presse zur herstellung von bauplatten aus mit bindemittel vermischten holzspaenen, holzwolle oder fasern
DE3108414A1 (de) * 1981-03-06 1982-09-23 Furnier- Und Sperrholzwerk J.F. Werz Jr. Kg Werzalit-Pressholzwerk, 7141 Oberstenfeld Vorrichtung zur herstellung von aus einem nicht steigfaehigen gemisch von faserstoffen und bindemitteln gepressten profilkoerpern
DE3321307C2 (de) * 1983-06-13 1986-06-19 Anton 8892 Kühbach Heggenstaller Verfahren zur Herstellung von Tragriegeln, Profilstäben, Balken u.dgl. aus gepreßten pflanzlichen Kleinteilen
DE3227074C2 (de) * 1982-03-11 1984-07-12 Anton 8892 Kühbach Heggenstaller Tragriegel aus mit Bindemitteln vermischten planzlichen Kleinteilen
EP0086899B1 (fr) * 1982-01-29 1986-10-29 Anton Heggenstaller Procédé et dispositif de moulage par compression d'un objet de forme, en particulier pour former une palette constituée d'une ou de plusieurs pièces d'une entretoise servant de support ou d'un profilé de poutre de charge
DE3307557A1 (de) * 1983-03-03 1984-09-06 Heggenstaller, Anton, 8892 Kühbach Verfahren und vorrichtung zum formpressen von profilen konstanten querschnitts aus pflanzlichen kleinteilen
DE3425392A1 (de) * 1984-07-10 1986-02-13 Bühler, Eugen, Dipl.-Ing., 8877 Burtenbach Verfahren zur herstellung von flachformlingen und einrichtung zur durchfuehrung dieses verfahrens
IT1181570B (it) * 1984-09-14 1987-09-30 Marcello Toncelli Procedimento per la formazione di blocchi di materiali qualsiasi mediante l'azione contemporanea di vibrapioni,compressione e vuoto destinati al taglio in lastre ed apparecchiature adatte a realizzare il procedimento stesso

Also Published As

Publication number Publication date
EP0432598A3 (en) 1991-10-16
ATE101353T1 (de) 1994-02-15
DE3941170A1 (de) 1991-06-20
DK0432598T3 (da) 1994-03-21
NO904474D0 (no) 1990-10-16
DE3941170C2 (fr) 1993-04-01
DE59004554D1 (de) 1994-03-24
NO904474L (no) 1991-06-14
EP0432598A2 (fr) 1991-06-19

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