EP0266582B1 - Meule pour bois - Google Patents

Meule pour bois Download PDF

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Publication number
EP0266582B1
EP0266582B1 EP87114887A EP87114887A EP0266582B1 EP 0266582 B1 EP0266582 B1 EP 0266582B1 EP 87114887 A EP87114887 A EP 87114887A EP 87114887 A EP87114887 A EP 87114887A EP 0266582 B1 EP0266582 B1 EP 0266582B1
Authority
EP
European Patent Office
Prior art keywords
auxiliary
ram
press
grindstone
wood pulp
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
EP87114887A
Other languages
German (de)
English (en)
Other versions
EP0266582A1 (fr
Inventor
Hans-Otto Henrich
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT87114887T priority Critical patent/ATE56764T1/de
Publication of EP0266582A1 publication Critical patent/EP0266582A1/fr
Application granted granted Critical
Publication of EP0266582B1 publication Critical patent/EP0266582B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/18—Disintegrating in mills in magazine-type machines
    • D21B1/24—Disintegrating in mills in magazine-type machines of the pocket type

Definitions

  • the invention relates to a wood grinder according to the preamble of claim 1.
  • a wood grinder is known from German patent specification 297 810.
  • press rams which are each guided in press chambers, which also serve as loading chambers for the wood beating around them to feed the common grinder magazine.
  • press rams are alternately pressurized so that due to the pressure propagation in the wood pile forming a pile in the press magazine, the pressing pressure propagates from wood beating to wood beating up to the grindstone surface.
  • the ram for the loading process is withdrawn into the upper pressure position, and after the other ram has dropped during its working stroke, the working stroke of this ram, which is associated with the just loaded partial magazine, is initiated. It is advisable to load each of the partial magazines of the individual press rams parallel to the axial direction of the grinder stone, since otherwise it would not be possible to load the partial magazines properly.
  • the distance of the lower edge, close to the grinder stone, of the central wall of the press magazines, which is arranged between them, i.e. also the lower stroke end of the press ram is of course to be chosen so that the grinding pressure exerted by a ram can also spread over the entire width of the press magazine in the area of the grinder stone surface in accordance with the slope angle for the pressure profile.
  • a disadvantage of this arrangement is that both the sub-magazines assigned to the individual rams must each be loaded with the wood beating themselves, so that a separate loading device is necessary in each case. Furthermore, in order to ensure the full pressing pressure and its uniformity with each working thrust, end plates must be provided in the area of the part magazine assigned to each individual pressing ram in the area near the grindstone, although these are not mentioned in the patent specification.
  • the object of the invention is now to provide a wood grinder in which only a single loading device for the press magazines is necessary.
  • Fig. 1 is in the middle of the magazine arrangement and the grindstone 1, the main press chamber 2, in which the main press ram 3 is arranged, which can be moved via push rod 8.
  • the drive of the ram is omitted. They are generally designed as known hydraulic servomotors.
  • To the side of the main press chamber 2 are the auxiliary press chambers 4 and 4 'with the associated auxiliary press dies 5 and 5', which are similarly driven by push rods 8 '.
  • the inner chamber walls 11, 12, which are parts of the main press chamber 2 simultaneously form the inner walls of the secondary press chambers 4 and 4 '.
  • the length - i.e. in axial, i.e. Stroke direction measured - the secondary press ram is preferably approximately equal to their effective press stroke, generally their stroke at all.
  • the position of the secondary ram 5 and 5 'shown is their starting position before the press stroke, at least as far as it concerns the beginning of the pressing of the wood by this ram.
  • the main press ram 3 is withdrawn without the pressure in the drive from the wood beating changes.
  • an end plate 7 is preferably pushed under the main press die 3 before it is retracted, so that the wood beating is prevented from escaping upwards.
  • the main press chamber 2 is reloaded with the wood beating, the end plate is pulled out of the press magazine again and the working stroke of the main press ram 3 begins.
  • the lower surface that is to say the bottom surface 6 or 17 of the secondary press rams is inclined, essentially parallel to the tangent to the grindstone surface in the area where the projection in the direction of the push rods of the secondary press rams falls on the grindstone surface.
  • This inclination can also be chosen somewhat differently, since it serves to generate the greatest possible force component in the direction of the grinder stone axis or the uppermost point of the grinder stone surface. This is to ensure that the pressure across the entire grinding zone affects the pile of wood beating as evenly as possible.
  • the end plate should be pushed in under the working pressure of the main press die 3 as far as possible, its edge in the closing pressure is sharpened, preferably with a long inclined surface, which is provided with file-like or rasp-like teeth, around the surface of the wooden stick over which the end plate slides to mill off and thus reduce the resistance for pushing in the end plate.
  • the chips and the escaping wood moisture on the milling surfaces lead to reduced frictional resistance.
  • the contact pressure of the press rams could also be temporarily removed or reduced.
  • FIG. 3 the press grinder is shown in cross section in the area of the main press die 3 seen from the side.
  • a wooden feed floor 21 is provided, which belongs to a wooden feed chamber which is open at the top, on which the wooden bumps are stored with their longitudinal extension parallel to the axis of the grinder stone 1 in order to be moved into the main press chamber 2 by means of a press ram 22 - actuated by a piston rod 23 . After this process, this is shut off by the lateral slide 25, which must also be sealed pressure-tight in the event that an excess pressure is to be maintained in the grinder housing.
  • Fig. 4 a variant is shown in which there is only a secondary press chamber 4 "and a secondary press ram 5".
  • the bottom surface 17 'of the secondary press ram 5 " is rounded off on its side facing the main press chamber 2 with a large radius which is in the range 4/5 of the width of the secondary press chamber 4" - measured in the circumferential direction of the grinder stone - or is somewhat larger. This ensures that when the secondary press ram 5 "is raised, the wood pushed in by the main press ram 3 or 3 'can be better distributed in the wide magazine and there is no sudden, lateral evasion of individual wood prods. Thus, the wood prods gradually slide to the side of the declining secondary press stamp.
  • the embodiment according to FIG. 4 seems to offer advantages over the one according to FIG. 1 in this respect.
  • the drive mechanism for the secondary press ram is also lighter here, since only a single secondary ram has to be driven.
  • the secondary press ram can be designed as a laterally open hollow box construction. It can be stiffened inside the box by means of ribs 19 and 20.
  • the length of the secondary press punches 5, 5 ', 5 " is preferably at least half the total stroke of the same, but at least equal to half the effective working stroke.
  • the length of the secondary press punches is preferably at least 4/5 of the effective working stroke of the same.
  • the length of the secondary press punches will also be at least 80% of the total stroke of the same, in order to avoid excessive switching frequency. In order to save material, it is better to choose the hollow construction according to FIG. 1 or the box construction according to FIG. 4 of the secondary press punches.
  • Fig. 1 is indicated by the dash-dotted lines yet another embodiment of the wooden shaft, in which the side walls have an inclination between 5 and 10 ° to each other, by the narrowing of the shaft a more uniform and stronger pressure of the wooden billets on the grinder stone by Ensure ram.
  • the wooden shaft would have to be made relatively long, since the side shaft walls must be parallel in the stroke area of the secondary punches 5 and 5 '.
  • the wide part of the wooden shaft could then be made relatively wide in order to obtain the same length of the grinding zone in its narrow part adjacent to the grinding stone surface as would be present without the inclined shaft walls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Paper (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (13)

1. Défibreur avec appareil d'acheminement à un magasin avec au moins deux pistons presseurs parallèles (2, 2', 5, 5', 5"), dont au moins un est guidé dans une chambre de pression (2, 2'), prévue pour le chargement dans les magasins des morceaux de bois, caractérisé: en ce qu'un piston presseur principal (3) est guidé dans une chambre de pression (2, 2') destinée également à charger les magasins de morceaux de bois, et en ce que l'extrémité d'au moins un des autres pistons presseurs secondaires (5, 5', 5") se situe proche de la fin de la course du dit piston presseur principal (3).
2. Défibreur selon la revendication 1, caractérisé: en ce que l'extrémité d'au moins l'un des autres pistons presseurs dits secondaires (5), se trouve, en son début de course effective de poussée, près de celle des extrémités de sa paroi de guidage (11, 11', 12), voisine du piston presseur principal, et qui est proche de la meule du défibreur.
3. Défibreur selon l'une quelconque des revendications 1 ou 2, caractérisé: en ce que, la longueur des pistons presseurs secondaires (5), mesurée dans le sens de leur trajet de déplacement, est au moins égale à la moitié de la course effective de la poussée.
4. Défibreur selon l'une quelconque des revendication 1 à 3, caractérisé: en ce que la course effective de poussée des pistons presseurs secondaires (5, 5') est au moins égale à la moitié de la course effective de poussée du piston principal (3).
5. Défibreur selon l'une quelconque des revendications 1 à 4, caractérisé: en ce qu'une plaque de fermeture (7) de la chambre principale de pression (2) perpendiculaire au trajet de déplacement du piston presseur principal (3), est disposée à l'extrémité de la chambre principale de pression (2), la plus proche de la meule du défibreur.
6. Défibreur selon l'une quelconque des revendications 1 à 5, caractérisé: en ce que la surface de pression des pistons secondaires (5, 5') est disposée de manière inclinée selon la tangente de la surface de la meule du défibreur (1), où la projection du piston secondaire tombe chaque fois, en direction de l'axe du piston secondaire pour produire une composante de la force de compression la plus grande possible vers l'axe de la meule du défibreur.
7. Défibreur selon la revendication 6, caractérisé: en ce que la surface de pression des pistons secondaires (5, 5') est réalisée, au moins dans sa zone située près de la chambre principale de pression (2), incurvée selon un grand rayon en direction de la chambre principale de pression (2).
8. Défibreur selon la revendication 7, caractérisé: en ce que le rayon de congé de la surface de pression des pistons secondaires est d'une dimension égale à, au moins, les 4/5 de la largeur des pistons secondaires, mesurée transversalement par rapport à l'axe de la meule du défibreur.
9. Défibreur selon la revendication 7, caractérisé: en ce que l'extrémité avant de la plaque de fermeture (7) est rendue oblique dans le sens du déplacement du piston et est munie de dents (15) à limes ou à râpes.
10. Défibreur selon l'une quelconque des revendications 1 à 9, caractérisé: en ce qu'autour des deux côtés du piston presseur principal (3), on a prévu chaque fois un piston presseur secondaire (3).
11. Défibreur selon la revendication 10, caractérisé: en ce que les pistons presseurs secondaires (5, 5') possèdent une commande d'avance simultanée.
12. Défibreur selon l'une quelconque des revendications 1 à 11, caractérisé: en ce que les pistons presseurs secondaires (5, 5') sont réalisés comme des réceptacles ouverts sur le côté par rapport à l'axe longitudinal de la bielle.
13. Défibreur selon l'un quelconque des revendications 1 à 12, caractérisé: en ce que la longueur des pistons presseurs secondaires (5), mesurée dans le sens de son trajet de déplacement, est au moins de la moitié de ce trajet de déplacement.
EP87114887A 1986-10-24 1987-10-13 Meule pour bois Expired - Lifetime EP0266582B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87114887T ATE56764T1 (de) 1986-10-24 1987-10-13 Holzschleifer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3636226 1986-10-24
DE19863636226 DE3636226A1 (de) 1986-10-24 1986-10-24 Holzschleifer

Publications (2)

Publication Number Publication Date
EP0266582A1 EP0266582A1 (fr) 1988-05-11
EP0266582B1 true EP0266582B1 (fr) 1990-09-19

Family

ID=6312401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114887A Expired - Lifetime EP0266582B1 (fr) 1986-10-24 1987-10-13 Meule pour bois

Country Status (7)

Country Link
US (1) US4840317A (fr)
EP (1) EP0266582B1 (fr)
AT (1) ATE56764T1 (fr)
DE (2) DE3636226A1 (fr)
ES (1) ES2017487B3 (fr)
FI (1) FI83792C (fr)
NO (1) NO874424L (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI101895B (fi) * 1996-12-16 1998-09-15 Valmet Corp Sovitelma puiden syöttämiseksi puuhiomakoneessa
FI101894B1 (fi) * 1996-12-16 1998-09-15 Valmet Corp Sovitelma jatkuvatoimisen hionnan aikaansaamiseksi puuhiomakoneessa
AT410762B (de) * 2001-01-15 2003-07-25 Bacher Helmut Vorrichtung zur zerkleinerung von abfallgut, insbesondere kunststoffabfällen, und verfahren zu ihrem betrieb

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE297810C (fr) *
US1359016A (en) * 1919-11-15 1920-11-16 James H Baker Pulp-wood grinder
DE421188C (de) * 1924-05-09 1925-11-07 Amme Fa Holzschleifer mit gruppenweise vereinigten Presskaesten
DE548889C (de) * 1928-04-01 1932-04-21 J M Voith Fa Holzschleifer mit Vorrichtung zum Anpressen des Holzes in breiten Presskaesten
DE814096C (de) * 1948-10-02 1951-09-20 Voith Gmbh J M Verfahren und Vorrichtung zum Betrieb von Holzschleifern
FI69653C (fi) * 1984-01-09 1986-03-10 Tampella Oy Ab Foerfarande och matningsanordning foer inmatning av en vedsatsi en tryckslipmaskin

Also Published As

Publication number Publication date
DE3636226A1 (de) 1988-04-28
EP0266582A1 (fr) 1988-05-11
FI83792C (fi) 1991-08-26
DE3765083D1 (de) 1990-10-25
ATE56764T1 (de) 1990-10-15
ES2017487B3 (es) 1991-02-16
NO874424D0 (no) 1987-10-23
FI874682L (fi) 1988-04-25
NO874424L (no) 1988-04-25
US4840317A (en) 1989-06-20
FI83792B (fi) 1991-05-15
FI874682A0 (fi) 1987-10-23

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