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EP0432598A2 - 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
EP0432598A2
EP0432598A2 EP19900123047 EP90123047A EP0432598A2 EP 0432598 A2 EP0432598 A2 EP 0432598A2 EP 19900123047 EP19900123047 EP 19900123047 EP 90123047 A EP90123047 A EP 90123047A EP 0432598 A2 EP0432598 A2 EP 0432598A2
Authority
EP
European Patent Office
Prior art keywords
pressing
press
jaws
station
main
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.)
Granted
Application number
EP19900123047
Other languages
German (de)
English (en)
Other versions
EP0432598A3 (en
EP0432598B1 (fr
Inventor
Franz Winterer
Wilhelm Nagl
Xaver Spies
Franz M. Heggenstaller
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.)
Anton Heggenstaller GmbH
Original Assignee
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.)
Filing date
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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Classifications

    • 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.
  • 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 and the end faces of the molded bodies slide along the heated walls of the hardening channel and undergo hardening like the strand in an extrusion press.
  • This avoids the fact that the pressed mixture of small parts can loosen on the said sides, which are not enclosed by the press jaws.
  • 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.
  • Another essential process step of the invention is that the pressure generators acting on the pressing jaws form the pressing pressure in a first stage and in a second stage the row formed from pressing jaws and shaped bodies by the sum of the height of a pressing jaw and a shaped body in cycles through the curing channel push.
  • the invention provides in a preferred embodiment that the pre-pressed molded 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 expedient design of a molding press for carrying out the method according to the invention.
  • the decisive factor 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 such press jaws with pressed molded bodies in between in a row through a curing channel, without having to make any special design efforts.
  • finite moldings of any type in particular, however, elongated profiles
  • 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 guardrail rods, guardrail runs and the like.
  • FIG. 1 shows a pre-pressing space (1) in a pre-pressing station (3), which is filled in the usual way with a mixture of small parts (2).
  • This pressing space is essentially enclosed by paired opposing and mutually movable pre-pressing jaws (4 to 7) and 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). In the position shown in FIG. 1, their pressing surfaces are flush with the guide surfaces for the upper and lower pre-pressing jaws (4, 5).
  • 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 side pre-pressing jaws (6, 7) are moved towards each other and move from the position according to FIG. 3 into that according to FIG. 4.
  • the blank pressed in this way (9) 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, offers itself as a conveying path. Therefore, these side pre-pressing jaws (6, 7) can also be used for transversely displacing the molded 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 which 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 lateral pre-press jaw pairs (6,7), one of which is assigned to the pre-press station (3) and the other pre-press jaw pair (5,6) 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 blank (9) can be fed alternately to one and then the other main press station (14) without unnecessary backward movement of the side movement of the pre-press jaw pairs (5, 6) ) takes place.
  • a vertical row (19) is now formed, consisting of press jaws (17) and molded bodies (18) located between them.
  • 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 hardening 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 presses on the pressing jaw (17) resting on the pressure generator (15) and thus on 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 downward movement, 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 shaped body (18) to be formed.
  • a hardened shaped 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 shaped 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 molded body (18), which can preferably be used for the production of frames, for example door frames.
  • the side of the press 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) form.
  • the side of the individual pressing 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.

Landscapes

  • 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)
  • Processing Of Solid Wastes (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Fertilizers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
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 true EP0432598A2 (fr) 1991-06-19
EP0432598A3 EP0432598A3 (en) 1991-10-16
EP0432598B1 EP0432598B1 (fr) 1994-02-09

Family

ID=6395388

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007115552A1 (fr) * 2006-04-04 2007-10-18 Dorst Technologies Gmbh & Co. Kg Procédé et dispositif de pressage pour former une pièce moulée par compression

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1374173A (en) * 1920-06-01 1921-04-12 Andrews Marcus Peytan Brickmaking apparatus
US3933968A (en) * 1968-01-29 1976-01-20 Pierre Sorbier Method of moulding articles from a paste like material
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
FR2501109A1 (fr) * 1981-03-06 1982-09-10 Werz Furnier Sperrholz Installation pour produire des corps profiles presses formes d'un melange non gonflable de matieres fibreuses et de liants
DE3307557A1 (de) * 1983-03-03 1984-09-06 Heggenstaller, Anton, 8892 Kühbach Verfahren und vorrichtung zum formpressen von profilen konstanten querschnitts aus pflanzlichen kleinteilen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
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.
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
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
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
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1374173A (en) * 1920-06-01 1921-04-12 Andrews Marcus Peytan Brickmaking apparatus
US3933968A (en) * 1968-01-29 1976-01-20 Pierre Sorbier Method of moulding articles from a paste like material
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
FR2501109A1 (fr) * 1981-03-06 1982-09-10 Werz Furnier Sperrholz Installation pour produire des corps profiles presses formes d'un melange non gonflable de matieres fibreuses et de liants
DE3307557A1 (de) * 1983-03-03 1984-09-06 Heggenstaller, Anton, 8892 Kühbach Verfahren und vorrichtung zum formpressen von profilen konstanten querschnitts aus pflanzlichen kleinteilen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007115552A1 (fr) * 2006-04-04 2007-10-18 Dorst Technologies Gmbh & Co. Kg Procédé et dispositif de pressage pour former une pièce moulée par compression

Also Published As

Publication number Publication date
DK0432598T3 (da) 1994-03-21
EP0432598A3 (en) 1991-10-16
NO904474D0 (no) 1990-10-16
ATE101353T1 (de) 1994-02-15
NO904474L (no) 1991-06-14
DE3941170A1 (de) 1991-06-20
EP0432598B1 (fr) 1994-02-09
DE59004554D1 (de) 1994-03-24
DE3941170C2 (fr) 1993-04-01

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