WO1987002911A1 - Dispositif de fragmentation - Google Patents

Dispositif de fragmentation Download PDF

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Publication number
WO1987002911A1
WO1987002911A1 PCT/EP1986/000656 EP8600656W WO8702911A1 WO 1987002911 A1 WO1987002911 A1 WO 1987002911A1 EP 8600656 W EP8600656 W EP 8600656W WO 8702911 A1 WO8702911 A1 WO 8702911A1
Authority
WO
WIPO (PCT)
Prior art keywords
knife
shaft
comminution device
disc
cutting
Prior art date
Application number
PCT/EP1986/000656
Other languages
German (de)
English (en)
Inventor
Rudolf Berger
Hans Kühl
Original Assignee
Umwelttechnik Hatlapa 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 Umwelttechnik Hatlapa Gmbh filed Critical Umwelttechnik Hatlapa Gmbh
Publication of WO1987002911A1 publication Critical patent/WO1987002911A1/fr
Priority to NO872902A priority Critical patent/NO872902D0/no
Priority to DK365987A priority patent/DK365987D0/da

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C18/182—Disc-shaped knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C2018/188—Stationary counter-knives; Mountings thereof

Definitions

  • the invention relates to a shredding device of the type specified in the preamble of claim 1.
  • a known comminution device of this type (FR-PS 1 438 869) has, inter alia, a shaft with disk knives and a comb with teeth which intermittently engage between them during the rotation of the knife disks, namely when the piercing cutting teeth pass between the comb teeth .
  • This known device is intended for tearing tough material in the form of balls and tapes, in particular paper tapes.
  • the disc knives are kept at a distance from one another and between counter bearings by means of intermediate discs with a smaller diameter.
  • This known device not only has the one shaft with cutter disks that interact with comb teeth, but an independently operating device with two counter-driven shafts, the disk knives of which interact at different peripheral speeds. In this case too, the cutter discs of the shafts only intermesh temporarily, namely only if they move past one another in the area of their piercing cutting teeth. This part of the device also only serves to tear tough material such as balls or ribbons.
  • shredding devices with two shafts driven in opposite directions and at different speeds are known (DE-PS 1 758 913, DE-OS 20 65 647), in which the disc knives of one shaft and not only their piercing cutting teeth during the entire revolution between the disc knives grasp the other shaft and form with these cutting edges, which are suitable for cutting waste to be shredded, which can also contain iron parts.
  • the knife disks are kept at a distance using a flange-like attachment, whose thickness is slightly, ie 0.2 to 0.1 mm larger than the width of the knife disks, so that the distance between the knife disks is only slightly larger than their thickness.
  • fitting and running-in work Such work is referred to as fitting and running-in work.
  • these known devices can only be carried out by the manufacturer himself. If one or more disc knives are damaged during operation, the entire device must be returned to the manufacturer and repaired there. This is particularly time consuming and expensive when such devices have been sold abroad or even overseas, which is very often the case.
  • Another known device with two shafts driven in opposite directions at different speeds with constantly intermeshing knife disks for comminuting waste materials has disk knives on, each of which comprises two conically prestressed disks.
  • the conical deformation is intended to absorb and compensate for displacements during cutting processes that form between two disk knives when the material to be processed is clamped.
  • the object of the invention is to develop a comminution device of the type specified in the preamble of claim 1 or 21 in such a way that cutting gaps with preselected small cutting air can be reached more easily without the need for lengthy fitting and running-in work, while avoiding the additive tolerances with a simplified structure of the entire device to let.
  • this object is achieved by the features specified in claim 1 in connection with a comminution device with a driven shaft and by the features specified in claims 1 and 21 in connection with a comminution device with two counter-driven shafts.
  • a major advantage of the invention is that. any kind of spacer rings between the disc knives or knife elements can be dispensed with, since the distances between adjacent disc knives or knife elements are determined solely by the knife elements or disc knives which interpose. Tilting of the disc knives during cutting operations with axial pressure acting on the cutting edges is jointly prevented by the sliding fit on the shaft and the disc knife or knife element reaching into the intermediate space. According to the invention, it is only necessary to ensure that the displacement resistance which is effective on the shaft axis, ie which opposes the displacement of a disk knife, is smaller than the maxi applied to the cutting edge of the disk knife in question during operation of the comminution device male axial pressure P1.
  • the displacement resistance effective on the shaft axis is equal to the product of the coefficient of friction between the hub of the disc knife under consideration and the shaft and the bearing reaction pressure at right angles to the shaft axis at the front end of the hub. This product must be less than the axial pressure applied to the cutting edges. It applies that the product of the axial pressure acting on the cutting edges and the radial distance of the cutting edge to the shaft axis is equal to the product of the axial length of the hub and the bearing reaction pressure acting on the end face of the hub at right angles to the shaft axis.
  • Such a device is therefore also suitable for preselecting the cutting air in the cutting gaps between all disk knives and knife elements in a single-shaft device or all intermeshing disk knives of a two-shaft device very small and, if necessary, also practically setting them to zero, especially when low speeds of less than 150 and preferably approximately 30 to 50 revolutions per minute can be selected.
  • Figure 1 is a sectional plan view of a shredding device with a driven shaft, on which a plurality of disc knives are placed at a distance from each other, between which knife elements engage from one side and strippers from the other side.
  • Fig. 2 is a cross sectional view taken along line II - II in Fig. 1, in which in particular the cross section shape of the driven shaft bwz. the hub of one
  • Fig. 3 is a sectional plan view in the area of a
  • Fig. 4 shows a second embodiment in a further development of the shredding device shown in Fig. 1, here two shafts driven in opposite directions at different speeds are provided, on each of which a plurality of disc knives are arranged, which mesh like a comb;
  • Fig. 5 is a cross sectional view taken along line V - V in
  • Fig. 6 is a sectional plan view of an end part of the device shown in Fig. 4, on which at the front end of the main shaft a floating bearing and
  • a comminution device 10 comprises a driven shaft 12, which is formed with six equidistantly arranged, radially projecting longitudinal webs 14 extending in the axial direction.
  • Disc knives 16 are also provided, each of which has an associated hub 18 to which it is firmly connected, for example by means of a brazed connection.
  • the hubs 18 have axially extending longitudinal grooves 20 provided with which they are pushed onto the shaft 12 in a sliding fit, in particular with a sliding fit and preferably with a sliding fit (according to DIN 7157).
  • Each disk knife 16 is composed of two disks 16a, 16b, both of which are of the same thickness and are set against each other by the distance between two longitudinal webs 14 with respect to the piercing cutting teeth or stylus knives 22 formed on their circumference.
  • Knife elements 24 are arranged on one side of the shaft 12 and scrapers 26 are arranged on the opposite side. Both the knife elements 24 and the disk knives 16 are made plane-parallel with an accuracy of at least 50 microns, advantageously less than 10 microns and preferably less than 1 micron and consist of cutting steel (C45).
  • the wipers 26 can be made of any suitable material and are 0.7 to 1 mm, advantageously 0.3 to 0.5 mm and preferably 0.1 to 0.3 mm thinner than the knife element 24.
  • each disk knife 16 has two piercing cutting teeth or stylus knives 22.
  • the stylus knives 22 are arranged in such a way that their tooth tips or stylus tips are oriented opposite one another with respect to the axis of rotation of the shaft and are at a distance from one another of approximately half the circumference of the disk knife.
  • Disc knives with prong teeth aligned in this way are particularly advantageous if the device can be operated effectively in both directions of rotation for comminution.
  • the knife elements 24 and the wipers 26 extend up to the circumference of the shaft 12 and can either extend about a quarter circle or more around the assigned shaft axis, as shown by solid lines, or can be designed with an upper edge which has such an inclination that its imaginary extension runs below the assigned shaft axis, as is shown with dashed lines Lines is shown.
  • the shaft 22 is mounted in two opposite walls 28 and 30 of a housing of the comminution device 10, not shown, in the wall 28 by means of a floating bearing 32 and in the wall 30 by means of a fixed bearing 34.
  • a drive wheel 36 is positively placed, which, for example, is in operation is driven by an electric motor, either by directly meshing intermeshing gears or by means of V-belts or toothed belts or other suitable power transmission arrangement.
  • the disk knives 16 on the one hand and the knife elements 24 or the wipers 26 on the other hand alternately mesh with one another, namely during the entire rotation of the knife disks 16.
  • adjacent disk knives 16 are deliberately free to move left, which can also be referred to as a play of the hubs 18 on the shaft 12.
  • this movement space or this play permits displacement of each individual disk knife 16 on the shaft 12 without the disk knives 16 tilting or even oscillating on the shaft 12. Rather, they are fitted onto the shaft 12 with a sliding fit, in particular with a sliding fit and preferably with a sliding fit.
  • the knife elements 24 are formed with a foot part, the width of which extends over the height of the housing frame and is formed with oppositely directed webs 38 which are slidably fitted into mutually directed U-shaped rails 40.
  • the floating bearing 32 is adjustable and adjustable for the purposes of the invention.
  • a plate spring arrangement 42 is inserted between the floating bearing 32 and the opposite end face of the adjacent disk knife 16.
  • a similar plate spring arrangement 42 can also be inserted between the outwardly directed end face of the disk knife 16 arranged at the opposite end of the shaft 12 and the opposite end face of the fixed bearing 34.
  • the wipers 26, like the knife elements 24, are formed with a foot part which is slidably inserted with associated webs 38 in assigned, mutually directed U-shaped rails 40. Since the wipers 26 are somewhat thinner than the knife elements 24, each wiper 26 has a certain one
  • the one-piece device 44 shown as an adjustable bolt serves two purposes according to the invention. First of all, it is used to set the required cutting air in the cutting gaps between adjacent disc knives 16 and knife elements 24 to a preselected value after the parts of the comminution device 10 have been assembled. This can be done, for example, by arranging the entire comminution device on a vibrating apparatus, the adjusting device 44 being rotated during a permanent vibrating process until the individual disc knives 16, which are displaceable on the shaft 12 under certain conditions, and the displaceably mounted knife elements 24 have shifted until the desired cutting air is reached at all points.
  • the cut air between all adjacent disc knives 16 and knife elements 24 can be set to less than 0.1 mm in the device according to the invention and can advantageously be set to less than 0.01 mm and preferably to practically zero. This makes the shredding device suitable for cutting even containers made of sheet metal, such as beverage cans, oil cans and the like, with certainty.
  • the second purpose of the adjusting device 44 is that users of such devices can readjust the cutting air at any time if it has become larger than desired due to abrasion during operation and the preselected spring travel of the plate spring arrangement 42 is no longer sufficient, the disk knives 16 and the knife elements 24 to be displaced so far that the loss of thickness of the disc knives 16 and the knife elements 24 is compensated for by frictional wear.
  • the moveable Part of the floating bearing 32 can then be pushed by means of the adjusting device 44 and the original operating state can be restored.
  • the plate spring arrangement 42 is designed in such a way that it maintains an approximately constant spring force of a preselected size over a spring travel of preselected length, so that the force from the plate spring arrangement 42 on the package of disk knives 16 with intervening knife elements 24 remains approximately constant over this spring travel.
  • the size and length of the spring travel with approximately constant spring force is selected such that the axial pressure in the cutting gaps is at least 500 to 50,000, advantageously 1000 to 20,000 and preferably 2000 to 10,000 Newtons, for a loss of length of approx.
  • the surfaces of the disk knives 16 and the knife elements 24, which are made of cutting steel and are plane-parallel with the above-specified accuracy, are all ground smooth or similarly smooth or smoother and additionally bath nitrided. Due to these requirements of the shredding device according to the invention, it is actually possible to operate it with a cutting air of practically zero without exception between all adjacent disc knives 16 and knife elements 24 without the parts that are rubbing against each other beginning to eat. This is at a suitably preselected low speed of the shaft 12 and a pre chose maximum value for the axial pressure in the cutting gaps even with an idle power that is less than 20%, preferably less than 10% of the nominal power. Suitable operating speeds for the shaft 12 are below 150, advantageously below 50 and preferably around 30 revolutions per minute.
  • the cut air in the cutting gaps between all adjacent disc knives 16 or knife elements 24 can thus be set so that even containers made of sheet metal with a wall thickness of 0.1 mm or less are cut with certainty.
  • FIG. 3 shows a partial top view of the comminution device 10 shown in FIG. 2 in the area of the floating bearing 32 with adjusting device 44 and opposing disc knife 16.
  • the disk knives 16 consist of two disks 16a, 16b arranged opposite one another, each of the disks 16a, 16b being provided with its own hub 18. This means that each disk knife 16 comprises two physically separate but directly abutting hubs 18, namely the hub 18 assigned to the disk 16a and the hub 18 assigned to the disk 16b.
  • a sealing arrangement is inserted into the space between two opposing end faces of hubs 18 of adjacent disks 16a, 16b of adjacent disk knives 16, which according to the illustration have an O-ring 46, one over the circumference around arranged cover band 48 and a retaining ring 50 encompassing this band 48. All these parts only have the function of keeping the space between each other, opposite hubs adjacent disc knives 16 free of dust and dirt, so that the axial displacement of all disc knives 16 with their associated hubs 18 on the shaft 12 at all times during the Lifespan guaranteed with the shredding device. Neither the band 48 nor the ring 50 exert an axial force on adjacent cutter disks, which somehow impairs their required axial displaceability on the shaft 12.
  • the cover band 48 like the O-ring 46, can be made of a material that is oiled or lubricated other suitable agents can be soaked and thereby saturated, so that the
  • the retaining ring 50 is used to securely hold the O-ring 46 and the cover band 48 in the assigned place.
  • the wipers 26 are always so much thinner than the knife elements 24 within the intended manufacturing tolerances that only the knife elements 24 exert an axial pressure on the adjacent knife elements 16, which is used to form the cutting gap with the provided low cutting air and to compensate loss of length due to frictional wear is required.
  • the wipers 26 are always so much thinner than the knife elements 24 that they do not hinder this function in any way.
  • the cutting gaps are formed by those directly opposite one another or in contact with one another
  • Surfaces of the disc knives 16 or knife elements 24 are formed in the region of their peripheral edges, specifically where these edges turn into the region of the surface of the opposite element.
  • FIGS. 4 to 6 A further embodiment is shown in FIGS. 4 to 6, which, in contrast to the first embodiment, comprises two shafts 112 and 113 which are driven independently of one another.
  • the two shafts 112 and 113 are driven in opposite directions at different speeds in order to obtain different circumferential speeds for the respectively assigned disk knives 116, 117.
  • Such different circumferential speeds can, however, also be achieved if the disk knives assigned to the two shafts have different radii.
  • the comminution device 110 instead of the knife elements 24 of the comminution device 10 according to the first embodiment, additionally has disc knives 117, which are also positively placed on the second driven shaft 113 and are offset on the latter so that they, like the knife elements 24 in the in the first embodiment, axially offset and interdigitated between the disk knives 116 on the shaft 112, constantly during the entire revolution of the disk knives 116, 117 of both shafts 112 and 113.
  • the disk knives 116 on shaft 1 12 are the hereinafter referred to as the main shaft 1 12, clamped between a counter bearing 135 and a floating bearing 132, a plate spring arrangement 142 being in turn inserted between the floating bearing 132 and the adjacent disk knife 116. It is also possible between the disc knife 116 at the opposite end of the main shaft
  • each is directed outwards Leave hub 118 and opposing thrust bearing 135 a clearance with a preselected axial length as play. It is possible and in some applications also sensible to use a plate spring arrangement on each end face of the auxiliary shaft 113 at this distance provided as play in order to apply a preselected axial pressure to the package of disc knives 16 arranged on this auxiliary shaft 113, which, however, permits axial play .
  • one of the disk knives 117 on the auxiliary shaft 113 is advantageously connected to the latter in an axially fixed manner, e.g. through a circlip arrangement.
  • the secondary shaft 113 is fixed in relation to the main shaft 112.
  • a disk knife 117 is preferably selected for this purpose, which lies approximately in the middle of the packet of disk knives 117.
  • the disk knives 116, 117 of the comminution device 110 are designed somewhat differently than the disk knives 16 of the comminution device 10 according to FIGS. 1 to 3.
  • the interlocking of the disks can decrease in their revolutions to a residual amount of approximately 2 to 5 mm, preferably 4 mm. Even then, the operating mode provided according to the invention is still fully guaranteed.
  • the axial pressures acting on the disc knives 116, 117 in the region of the knife edges are almost completely exerted by the assigned hubs 118 or by their interaction with their shaft recorded without the disc knives 116 noticeably tilting within the intended operating values, ie noticeably changing the intended cutting air in the cutting gap.
  • wipers 126 engage from both opposite sides like a comb between the disk knives 116, 117 on the main shaft 112 and the secondary shaft 113.
  • the wipers extend into the vicinity of the associated shaft axis and can either extend around a quarter circle or more around it or have an upper edge which is inclined so that its imaginary extension is below runs half of the assigned shaft axis.
  • the wipers 126 of the comminution device 110 can additionally be attached to one
  • the disc knife is biased against a fixed stop. They can then be swiveled over a swivel path of a preselected length.
  • the swivel path can be selected so that they swivel completely out of the area between the adjacent disc knives or that they only move a preselected path length between the adjacent disc knives.
  • the wipers pivot completely out of the way so that an obstacle that cannot be crushed can pass through, while in the second case they form a kind of "crumple zone", i.e. absorb the momentum of all parts of the device when a non-crushable part is placed between them.
  • Such a pivotable arrangement is preferably provided in the knife elements of the comminution device 10 with a shaft according to the first embodiment.
  • connection with the frictional resistance between the hub 18 or 118 and the shaft 12 or 112, 113 should be such that the following inequality is fulfilled:
  • L1 the maximum radial distance between the shaft axis and the cutting edge
  • L2 the axial length along which the hub sits on the shaft in the sliding seat
  • ⁇ the coefficient of friction between the hub and the shaft
  • a displacement of each disk knife 16 or 116, 117 on the associated shaft 12 or 112 is only possible if the displacement resistance P3 effective on the shaft axis is less than the axial pressure P1 acting on the knife edge.
  • this ratio can be influenced in the intended sense for given values for L1 and L2 by reducing the coefficient of friction. This can be done, for example, by using suitable and highly effective lubricants.
  • the cutting air in the cutting gaps between all disc knives 116 on the main shaft 112 and on the auxiliary shaft 113 to be set practically to zero without the risk of seizing between the surfaces of the parts rotating relative to one another, in particular if the conditions already explained above in connection with the comminution device 10 are met.
  • Prerequisites include a suitable material for the cutting steel of the disc knives, a sufficiently high accuracy of plane parallelism as well as a suitable smoothing of the surfaces of the disc knives as well as a suitably chosen sliding fit of the hubs on the shafts and the use of a suitable lubricant.
  • the piercing cutting teeth or graver blades 22 and 122 of both forms of execution each have one in the direction of rotation tion above / the axial plane containing the shaft plane projecting, sickle-shaped tooth tip with which they force the material to be shredded into the cutting gap.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

Dispositif de fragmentation avec au moins un cylindre motorisé (12) comportant des lames à disque (16) montées par liaison de forme et déplacées dans le sens axial, lesdites lames étant maintenues entre des supports (32, 34) et possédant sur leur pourtour des dents de perçage-coupe, qui sont disposées axialement et successivement dans le sens périphérique. D'un côté les éléments à lame (24) passent à la manière d'un peigne entre les lames à disque (16). A la place des éléments à lame (24) on peut installer un deuxième cylindre équipé de lames à disque du même genre entraîné dans le sens contraire à une autre vitesse de rotation, lesdites lames passant à la manière d'un peigne entre celles du premier cylindre. Toutes les lames à disque (16) et tous les éléments à lame (24) sont montés sur leurs cylindres appropriés avec un ajustage doux. Entre toutes les lames à disque ou tous les éléments à couteaux sur leurs cylindres appropriés on laisse une liberté de mouvement, ce qui permet leur déplacement. Les supports (32) appliquent une pression axiale appropriée sur les lames à disque disposées du côté de la face avant, ladite pression étant transmise aux éléments à lame ou lames à disque suivants du deuxième cylindre et retransmise à son tour aux lames à disque de l'autre cylindre entraîné. De cette manière on peut facilement régler d'avance même un faible écartement de coupe sans avoir besoin d'utiliser les pièces d'écartement précises respectant des tolérances étroites qui ont été jusqu'à présent nécessaires.
PCT/EP1986/000656 1985-11-18 1986-11-13 Dispositif de fragmentation WO1987002911A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NO872902A NO872902D0 (no) 1985-11-18 1987-07-13 Kutteanordning.
DK365987A DK365987D0 (da) 1985-11-18 1987-07-14 Findelingsapparat

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3540896.0 1985-11-18
DE19853540896 DE3540896A1 (de) 1985-11-18 1985-11-18 Zerkleinerungsvorrichtung

Publications (1)

Publication Number Publication Date
WO1987002911A1 true WO1987002911A1 (fr) 1987-05-21

Family

ID=6286306

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1986/000656 WO1987002911A1 (fr) 1985-11-18 1986-11-13 Dispositif de fragmentation

Country Status (3)

Country Link
AU (1) AU6720687A (fr)
DE (2) DE8532599U1 (fr)
WO (1) WO1987002911A1 (fr)

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DE8532599U1 (de) * 1985-11-18 1986-02-20 Bohmter Maschinenfabrik Gmbh & Co Kg, 4508 Bohmte Zerkleinerungsvorrichtung
DE9108230U1 (de) * 1991-07-04 1991-09-05 Bannwarth, Roland, 7860 Schopfheim Schredder zum Zerkleinern von Gegenständen
DE4125318C1 (en) * 1991-07-31 1992-12-17 Karl O-8027 Dresden De Klick Mobile crusher for textile based floor covers - has web feeder as jacketed, smooth tube, with walls interconnected by bend- and torsion-resistant strap(s)
DE4236121C2 (de) * 1992-10-27 1996-07-18 Hermann Schwelling Vorzerkleinerungs- und Dosiervorrichtung, insbesondere für Großanlagen zur Vernichtung von Akten u. ä. Abfallmaterialien
DE9422104U1 (de) 1994-07-06 1998-01-22 Svedala Lindemann GmbH, 40231 Düsseldorf Rotorschere zum Zerkleinern von insbesondere sperrigen Abfällen
AUPP135598A0 (en) * 1998-01-16 1998-02-05 Parke, Terrence James Improvements in or relating to comminution devices
FR2812565A1 (fr) * 2000-08-01 2002-02-08 S M P In Pere & Fils Fa Element de broyage pour un broyeur pour dechets de matieres plastiques
DE20015620U1 (de) * 2000-09-09 2001-12-13 Paal's Packpressen-Fabrik GmbH & Co KG, 49124 Georgsmarienhütte Zerkleinerungsmaschinen für Akten
DE10220558A1 (de) * 2002-05-02 2003-11-13 Schleicher & Co Int Ag Schneidwerk für einen Dokumentenvernichter
FI20045304A (fi) 2004-08-24 2004-08-24 Tana Oy Repijämurskain
CN2915259Y (zh) 2006-07-14 2007-06-27 上海震旦办公设备有限公司 碎纸机触碰安全装置
US8008812B2 (en) 2006-07-14 2011-08-30 Aurora Office Equipment Co., Ltd. Paper shredder control system responsive to touch-sensitive element
US7637448B2 (en) 2007-02-21 2009-12-29 Fellowes, Inc. Plastic center shredder disc
CN201239643Y (zh) 2008-08-06 2009-05-20 上海震旦办公设备有限公司 不择纸的全自动碎纸机
CN201244502Y (zh) 2008-08-19 2009-05-27 上海震旦办公设备有限公司 自动碎纸机可剃钉结构
CN101543800A (zh) 2009-05-07 2009-09-30 上海震旦办公设备有限公司 碎纸机防卡纸保护装置
US8708260B2 (en) 2011-08-08 2014-04-29 Aurora Office Equipment Co., Ltd. Depowered standby paper shredder and method
CN106442309B (zh) * 2016-08-31 2023-10-24 威海华菱光电股份有限公司 检测设备及方法
CN109226650B (zh) * 2018-11-20 2020-07-07 东莞市正品五金电子有限公司 一种齿轮轴冷挤压加工的成型模具及其加工方法

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Publication number Priority date Publication date Assignee Title
FR1438869A (fr) * 1965-07-01 1966-05-13 Soest Ferrum Appbau G M B H Dispositif pour déchirer une matière tenace sous forme de pelote ou de ruban
LU57949A1 (fr) * 1968-09-03 1969-05-22
FR2087608A5 (fr) * 1970-05-26 1971-12-31 Sodequip
DE2065647A1 (de) * 1970-10-22 1974-10-03 Werner Schwarz Vorrichtung zum zerkleinern von abfall
DE2159513A1 (de) * 1971-12-01 1973-06-07 Licentia Gmbh Aktenvernichtungsmaschine
FR2165400A5 (fr) * 1971-12-24 1973-08-03 Haberle Wilhelm
DE2450936A1 (de) * 1973-10-24 1975-04-30 Eugene M A Baikoff Vorrichtung zum zerstueckeln von zu vernichtendem sperrgut
GB2076311A (en) * 1980-05-27 1981-12-02 Ofrex Group Ltd Document shredding machine
GB2091128A (en) * 1981-01-16 1982-07-28 Sant Andrea Novara Officine Trituration machine, and cutting blades therefor
US4423844A (en) * 1981-10-02 1984-01-03 Triple/S Dynamics, Inc. Apparatus for shredding materials
DE3313231A1 (de) * 1983-04-13 1984-10-18 Geha-Werke Gmbh, 3000 Hannover Schneidwerk fuer aktenvernichter
DE3505075A1 (de) * 1985-02-14 1985-08-14 Alois Zettler Elektrotechnische Fabrik GmbH, 8000 München Geraet zum vernichten von blattfoermigen material
DE8532599U1 (de) * 1985-11-18 1986-02-20 Bohmter Maschinenfabrik Gmbh & Co Kg, 4508 Bohmte Zerkleinerungsvorrichtung

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Publication number Publication date
DE3540896A1 (de) 1987-05-21
DE8532599U1 (de) 1986-02-20
AU6720687A (en) 1987-06-02

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