EP0339495A2 - Procédé et dispositif pour extruder des profils, en particulier pour extruder des tubes à partir d'un mélange de copeaux végétaux et de liants - Google Patents

Procédé et dispositif pour extruder des profils, en particulier pour extruder des tubes à partir d'un mélange de copeaux végétaux et de liants Download PDF

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Publication number
EP0339495A2
EP0339495A2 EP89107163A EP89107163A EP0339495A2 EP 0339495 A2 EP0339495 A2 EP 0339495A2 EP 89107163 A EP89107163 A EP 89107163A EP 89107163 A EP89107163 A EP 89107163A EP 0339495 A2 EP0339495 A2 EP 0339495A2
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EP
European Patent Office
Prior art keywords
mandrels
filling
partitions
pressing
strands
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.)
Ceased
Application number
EP89107163A
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German (de)
English (en)
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EP0339495A3 (fr
Inventor
Karl Schedlbauer
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.)
Individual
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Individual
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25867420&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0339495(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19883814099 external-priority patent/DE3814099A1/de
Priority claimed from DE19883814103 external-priority patent/DE3814103C2/de
Application filed by Individual filed Critical Individual
Priority to EP94113635A priority Critical patent/EP0638401B1/fr
Publication of EP0339495A2 publication Critical patent/EP0339495A2/fr
Publication of EP0339495A3 publication Critical patent/EP0339495A3/fr
Ceased legal-status Critical Current

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Classifications

    • 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
    • B30B11/22—Extrusion presses; Dies therefor
    • B30B11/26—Extrusion presses; Dies therefor using press rams
    • 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
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/28—Moulding or pressing characterised by using extrusion presses
    • 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
    • B27N5/02—Hollow articles

Definitions

  • the invention relates to a method and a device for extruding or extruding a mixture of small plant parts, in particular small wooden parts with binders, in which the mixture is compressed by the press ram of an extruder in a filling space and solidified in a curing channel.
  • the mixture should be transferred in a felting state by means of an extended stroke of 400 to 800 mm and a feed speed of the extrusion die of 0.04 to 1.5 m / s, which should result in increased strength of the strand.
  • the parts of the batch lie with one of their large areas parallel to the lower boundary wall of the filling chamber. During the compression process, they try to fold parallel to the end face of the extrusion die. However, a larger volume of the filling space would be necessary for this transfer.
  • the closing slide which the filling space during the compression tightly closed, an increase in volume by evading parts of the batch in the filling space is not possible.
  • the volume of the press ram becomes smaller and smaller until the final compression is achieved. As a result, the parts of the batch can only partially change their original position and become entangled when they are compressed. This happens regardless of the feed speed of the ram.
  • the mixture of small plant parts does not behave like a liquid during compression, which evenly transmits the pressure on all sides, but rather is the pressure acting on the parallel boundary walls that delimit the filling space, as well as the compression, the weight and the specific weight of that with the
  • the compression stroke of the extrusion die produced on the end face of the extrusion die is greatest and decreases towards the front end of the pressed extrusion part, which adjoins the extrusion part generated in the previous compression stroke.
  • the lower compressed beginning of the next strand part follows the higher compressed end of a strand part produced with each press stroke.
  • the invention has for its object to provide a method for the extrusion of a mixture of small plant parts with binders, the product obtained being as homogeneous as possible over the entire length and thus withstanding a higher load and thus load-bearing components such as beams can and can only be produced as much batch is compressed as is necessary to achieve the necessary strength.
  • the limits of performance should be further developed so that at least twice, preferably a multiple, of output is achieved with the same product quality, and different strands can be produced on the same rail at the same time.
  • the invention is based on the knowledge that the greater the difference in the compression of the strand parts at their ends or over their length, the smaller the breaking strength (bending strength) of a strand, and that the greater the difference in compression, the longer the compression stroke and thus the strand section generated.
  • the angle of the wedge-shaped extension is determined by the profile of the strand, the length of the filling space and the size of the compression.
  • part of the pressing force of the extrusion die is transferred to the boundary walls during compression.
  • the part of the pressing force acting on the boundary walls is greatest at the end of the extrusion die and the least at the other end. Since the structure of the parts of the batch is largely preserved during compression, only a certain part of the parts of the batch want to avoid crosswise to the pressing direction. The material therefore does not flow through the smallest slits, as in metal extrusion, for example, when compacting.
  • the invention shows that when the final compression of the extruded part generated with the press stroke, the force acting on the boundary surfaces of the filling space at any point, on a line, in the length of the extruded portion is equal or at least approximately is the same size.
  • the compression, the weights and the specific weight are equally large.
  • Another very special advantage of the invention lies in the possible length of the compression stroke as a function of the strand cross-sectional dimension. According to the invention, the length can be at least 10 times the smallest size of the strand cross-sectional dimension, i.e. it is only separated from the size of the strand cross-section. With a pallet block profile of 145 x 145 mm, e.g. a compression stroke length of 1,500 to 2,200 mm can be realized.
  • Another advantage of the invention lies in the surface properties of the strand produced. Because about that The length of the strand section and thus the same compression prevails over the entire strand, there is also the same surface structure, the same degree of roughness, the same appearance and, for finishing the strand with veneers, useful woods or other load-bearing materials, an identical profile support. Percentage (DIN 4762).
  • Another advantage of the invention results from the uniform compression over the length of the strand section produced with each press stroke.
  • the needle extraction value is correspondingly uniform.
  • Products with comparable strength can be produced with low compaction force and the use of materials, or products with higher quality or smaller dimensions that can be nailed without problems, since there are no or only very slight fluctuations in the nail extraction value.
  • the final product produced e.g. As a result, pallets can be manufactured at higher quality or at lower cost. This also results in a lower weight.
  • the invention is also based on the finding that moving partitions can divide the filling and compression space and the curing duct into at least two or more spaces or ducts in which two or more strands are produced.
  • the invention is further based on the knowledge that the small parts, in particular small wooden parts with binders, during extrusion and extrusion tube pressing, if their structure is largely preserved, for example does not behave like metals that flow through the smallest slits and openings. As a result, it is possible to have even larger slits or gaps between the partition walls and the boundary walls of the filler without significantly impairing the surface. and press room as well as the curing channel.
  • slots or gaps do not have to fulfill the condition of widening or narrowing in a wedge shape in the pressing direction, since otherwise the mixture contained therein would condense in such a way that the partition walls would jam. It has proven to be advantageous to design the dividing walls to be pointed in this way with tips lying outwards, so that the batch located in the slots or gaps can be led out of them.
  • the invention is further based on the knowledge that any type of positive guidance of the partition walls brings with it problems that are difficult to solve by pinching small parts of the batch.
  • the invention therefore teaches to dispense with such constrained guides and to use the strands themselves as longitudinal or vertical guides.
  • the protection can follow both by the extrusion stamps and by guide elements located behind the filling opening, the closing slide exerting a transverse force on the partitions.
  • the length of the partition walls is such that the static friction between the wall and the strand is greater than the pressing force, minus the frictional forces acting on the outer surfaces of the strand.
  • the partition walls are made thinner in such a way that they do not generate significant friction with the strands, but the heat from the partitions with as little as possible Transfer gap losses into the strands. From this length, the internal dimensional stability of the strands in the hardening channel is so great that the glue rest is retained for the final setting, despite the press file.
  • the partitions are connected to one another at their rear end with connecting elements and / or a crossmember and, by means of a common lifting device, preferably hydraulic cylinders, are braked against running along with the compressed strands and withdrawn against the pressing direction, so that they fulfill the object set by the invention.
  • a common lifting device preferably hydraulic cylinders
  • the invention is not limited to the extrusion of full strands, but also teaches the extrusion of hollow strands over standing and / or moving mandrels.
  • extrusion tube pressing with standing mandrels which is particularly suitable for shorter and / or thinner mandrels, these are fastened with the stroke generators associated behind and between the partition walls. These standing thorns can of course be heated.
  • extrusion tube presses with moving mandrels these can be fastened in a simple manner with connecting elements to the crossbars connecting the partition walls with the associated lift generators.
  • this method is only suitable for mandrels up to a certain length and size of the cross section because otherwise, since the mandrels are retracted into their starting length together with the partition walls after the extrusions have been pressed out, the retraction force is greater than the pressing force of the extrusion dies. Since these secure the strands against retraction against the pressing direction when retracting the partitions and mandrels, the would with this press stroke formed strand parts are post-compressed.
  • the invention teaches to connect all mandrels with connecting elements via a crossbar to an elevator, preferably hydraulic cylinders. This allows the mandrels and the partitions to completely or partially secure the strand against retraction and to be retracted separately into their starting position. Post-compression of the extruded parts produced with the press stroke does not take place since the respective retraction force of the mandrels or partition walls is less than the press force of the press dies belonging to the extrudates.
  • the mandrels can also have other tasks which do not allow them to be pulled back together into their starting position.
  • the invention teaches to connect each individual mandrel or the mandrels of each strand to a single stroke generator, preferably hydraulic cylinders, and to let them brake or control them.
  • the invention can be combined with closing slides, curing channels and filling and pressing rooms.
  • Other advantages in terms of product quality result from devices which do not provide a closing slide, since considerably less material escapes back into the filling space during compression. With such devices, this effect can be further increased by letting the partitions and, if present, the mandrels run at a certain speed from the start of the press, which is usually lower than that of the press ram.
  • Another advantage of the invention is that strands with different cross sections can be extruded and extruded tubes simultaneously on one device.
  • the mixture of small plant parts reaches a filling chamber 1 into a filling chamber 2, the inlet opening of which is closed by a closing slide 3 during the compression process.
  • the passage opening 4 of the closing slide 3 which can be moved back and forth by the lifting device 5, is above the inlet opening of the filling chamber 2 and allows the batch to fall through from the filling shaft 1 into the filling chamber 2.
  • the cross section of the filling chamber 2 widens with the angle 6 from the size 7 of the extrusion-side end 8 to the size 9 of the hardening channel end 10.
  • the parts of the batch located at the end 8 of the extrusion die can, however, deviate transversely to the direction by the amount of the wedge-shaped extension, that is to say the dimensional difference between the size 7 of the end 8 of the extrusion die and the size 9 of the end 10 on the hardening channel side.
  • the parts of the batch located between the ends 8 and 10 can, however, move transversely to the pressing direction according to their position in the filling space 2.
  • the part of the compression pressure acting transversely to the extrusion direction through the extrusion die 11 on the batch at any point, on a line lying in the pressing direction of the strand section produced with the compression stroke is the same or approximately the same size, since the parts of the In accordance with their position in the filling chamber 2, the compression pressure can partially evade.
  • the compression length 12 can be at least 10 times the smallest strand cross-sectional dimension (equal to the size 9 of the hardening channel end 10), but is only limited by the size of the strand cross-section.
  • the walls of the curing channel 13 can widen or narrow in relation to one another in a wedge-shaped or step-like manner or can be executed in parallel, depending on the embodiment. Extensions or narrowing along non-straight lines can also be carried out as required.
  • the strands are approximately the same size.
  • the press rams 17, 17 'and 17' which are connected via the cross member 18 with the stroke generators 19 and 19 '.
  • the partitions 20 and 20 ' which are connected by connecting elements 21 and 21' via the crossmember 22 to the lift generators 23 and 23 '.
  • the press rams 17, 17 'and 17 ⁇ move forward until the batch located in the filling and pressing chamber 14 has adjusted to its final compression.
  • the amount of compression, weights and specific Weight is determined by the friction between the strands 16, 16 'and 16' and the partitions 20 and 20 'and the mandrels 24, 24' and 24 'on the pressure in the stroke generators 23 and 23' and 27 and 27 '.
  • these selectable, adjustable and reproducible pressures are reached - they can be the same or different - the pressure medium is discharged via the valves belonging to the stroke generators and the partitions and the mandrels run along with the strands in the pressing direction.
  • the strand part generated with the press stroke Upon reaching the final compression, the strand part generated with the press stroke, these are connected to their strands 16, 16 'and 16 ⁇ and are pressed. While the ram 17, 17 'and 17 ⁇ are in their front end position, the mandrels and then the partitions or vice versa the partitions and then the mandrels are returned to their starting position.
  • a three-strand extrusion device is selected.
  • the filling and pressing chamber 34 through which the partitions 20 and 20 'to the mandrels 24, 24' and 24 ⁇ pass, is filled by a device for filling extruders and extrusion presses and closed during compression and squeezing.
  • a five-strand extrusion device is selected.
  • the filling and pressing space 34 is hereby filled by a device for filling extrusion and extrusion tube presses, and closed during the compression and extrusion.
  • the particular advantage in this exemplary embodiment lies in the short length of the filling and closing movement of the stroke generator 38 driving the closing slide 37. The more and / or wider strands are produced on one device, the greater this advantage in relation to the output.
  • the invention is not limited to the illustrated exemplary embodiments and combinations with filling devices and pressing and filling rooms. Rather, it is advantageously compressible in all known devices of this type.
  • the invention has very particular advantages in terms of output and production quality in processes which do not provide any closing slides, since less material escapes back into the inlet shaft during compression and pressing. With such devices, this effect can be further increased by letting the partitions and, if available, the mandrels run from the start of the press at a speed that is usually lower than the press rams.
  • strands with the same or different cross sections can be stranded simultaneously on one device pressed and / or extruded with one or more mandrels per strand.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Glanulating (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
EP19890107163 1988-04-26 1989-04-20 Procédé et dispositif pour extruder des profils, en particulier pour extruder des tubes à partir d'un mélange de copeaux végétaux et de liants Ceased EP0339495A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94113635A EP0638401B1 (fr) 1988-04-26 1989-04-20 Procédé et dispositif pour extruder des profils, en particulier pour extruder des tubes à partir d'un mélange de copeaux végétaux et de liants

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3814103 1988-04-26
DE3814099 1988-04-26
DE19883814099 DE3814099A1 (de) 1988-04-26 1988-04-26 Verfahren und vorrichtung zum strang- und stranrohrpressen von kleinteilen, insbesondere holzkleinteilen, mit bindemitteln
DE19883814103 DE3814103C2 (de) 1988-04-26 1988-04-26 Verfahren und Vorrichtung zum Strangpressen eines Gemenges aus pflanzlichen Kleinteilen mit Bindemitteln

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP94113635A Division EP0638401B1 (fr) 1988-04-26 1989-04-20 Procédé et dispositif pour extruder des profils, en particulier pour extruder des tubes à partir d'un mélange de copeaux végétaux et de liants
EP94113635.0 Division-Into 1989-04-20

Publications (2)

Publication Number Publication Date
EP0339495A2 true EP0339495A2 (fr) 1989-11-02
EP0339495A3 EP0339495A3 (fr) 1991-04-03

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ID=25867420

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Application Number Title Priority Date Filing Date
EP94113635A Expired - Lifetime EP0638401B1 (fr) 1988-04-26 1989-04-20 Procédé et dispositif pour extruder des profils, en particulier pour extruder des tubes à partir d'un mélange de copeaux végétaux et de liants
EP19890107163 Ceased EP0339495A3 (fr) 1988-04-26 1989-04-20 Procédé et dispositif pour extruder des profils, en particulier pour extruder des tubes à partir d'un mélange de copeaux végétaux et de liants

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP94113635A Expired - Lifetime EP0638401B1 (fr) 1988-04-26 1989-04-20 Procédé et dispositif pour extruder des profils, en particulier pour extruder des tubes à partir d'un mélange de copeaux végétaux et de liants

Country Status (3)

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EP (2) EP0638401B1 (fr)
AT (1) ATE141544T1 (fr)
DE (1) DE58909715D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117659A1 (de) * 1991-05-29 1992-12-03 Karl Schedlbauer Vorrichtung zum dosierten einbringen eines gemenges aus kleinteilen, insbesondere pflanzlicher kleinteile in den fuell- und pressraum einer strang- oder strangrohrpresse
EP0718079A1 (fr) * 1994-12-14 1996-06-26 Karl Schedlbauer Procédé et dispositif pour la fabrication de panneaux et bandes tubulaires
EP0908281A1 (fr) * 1997-10-10 1999-04-14 Werzalit Ag + Co. Procédé et dispositif pour fabriquer des articles moulés
DE102010012838B4 (de) * 2010-03-25 2015-06-18 Guido Pusch Vorrichtung zur Herstellung von Presskörpern
CN106221844A (zh) * 2016-08-20 2016-12-14 艾国华 制造以竹木屑为原料的环保生物燃料的自动化挤压设备
WO2021140145A1 (fr) * 2020-01-10 2021-07-15 Pfeifer Holz Gmbh Presse de filage par extrusion, produit extrudé et procédé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714256A1 (de) 1977-03-31 1978-10-05 Anton Heggenstaller Vorrichtung zum strangpressen von stangen, profilen o.dgl. aus mit bindemitteln versehenen pflanzlichen kleinteilen
DE2932406A1 (de) 1979-08-09 1981-02-12 Anton Heggenstaller Verfahren und vorrichtungen zum strangpressen eines gemenges aus pflanzlichen kleinteilen und bindemitteln

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE432095C (de) * 1922-09-06 1926-07-26 Candlot Sa Fa Ets Strangbrikettpresse mit sich erweiterndem Presskanal
DE1058658B (de) * 1956-03-19 1959-06-04 E H Leo Pungs Dr Ing Dr Ing Verfahren und Einrichtung zur kontinuierlichen Herstellung von Holzspan-Formpresskoerpern, insbesondere Holzspanplatten
US3530552A (en) * 1968-04-29 1970-09-29 Glen H Calder Extrusion device
DE2932405C2 (de) * 1979-08-09 1986-03-06 Anton 8892 Kühbach Heggenstaller Verfahren und Strangpresse zur Herstellung von mit Bindemittel vermischten pflanzlichen Kleinteilen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714256A1 (de) 1977-03-31 1978-10-05 Anton Heggenstaller Vorrichtung zum strangpressen von stangen, profilen o.dgl. aus mit bindemitteln versehenen pflanzlichen kleinteilen
DE2932406A1 (de) 1979-08-09 1981-02-12 Anton Heggenstaller Verfahren und vorrichtungen zum strangpressen eines gemenges aus pflanzlichen kleinteilen und bindemitteln

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HOLZZENTRALBLATT, vol. 45, 13 April 1988 (1988-04-13), pages 650

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117659A1 (de) * 1991-05-29 1992-12-03 Karl Schedlbauer Vorrichtung zum dosierten einbringen eines gemenges aus kleinteilen, insbesondere pflanzlicher kleinteile in den fuell- und pressraum einer strang- oder strangrohrpresse
BE1006847A4 (fr) * 1991-05-29 1995-01-03 Karl Schedlbauer Dispositif de chargement dose d'un melange de petits fragments, notamment vegetaux, dans la chambre de remplissage et de compression d'une extrudeuse ou presse a boudiner.
EP0718079A1 (fr) * 1994-12-14 1996-06-26 Karl Schedlbauer Procédé et dispositif pour la fabrication de panneaux et bandes tubulaires
EP0908281A1 (fr) * 1997-10-10 1999-04-14 Werzalit Ag + Co. Procédé et dispositif pour fabriquer des articles moulés
DE102010012838B4 (de) * 2010-03-25 2015-06-18 Guido Pusch Vorrichtung zur Herstellung von Presskörpern
CN106221844A (zh) * 2016-08-20 2016-12-14 艾国华 制造以竹木屑为原料的环保生物燃料的自动化挤压设备
CN106221844B (zh) * 2016-08-20 2019-08-09 湛江守仁生物质有限公司 制造以竹木屑为原料的环保生物燃料的自动化挤压设备
WO2021140145A1 (fr) * 2020-01-10 2021-07-15 Pfeifer Holz Gmbh Presse de filage par extrusion, produit extrudé et procédé

Also Published As

Publication number Publication date
EP0339495A3 (fr) 1991-04-03
DE58909715D1 (de) 1996-09-26
EP0638401A1 (fr) 1995-02-15
ATE141544T1 (de) 1996-09-15
EP0638401B1 (fr) 1996-08-21

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