EP0266447A1 - Dispositif de coupe rotatif, en particulier pour un granulateur de matière plastique - Google Patents

Dispositif de coupe rotatif, en particulier pour un granulateur de matière plastique Download PDF

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Publication number
EP0266447A1
EP0266447A1 EP86115293A EP86115293A EP0266447A1 EP 0266447 A1 EP0266447 A1 EP 0266447A1 EP 86115293 A EP86115293 A EP 86115293A EP 86115293 A EP86115293 A EP 86115293A EP 0266447 A1 EP0266447 A1 EP 0266447A1
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EP
European Patent Office
Prior art keywords
cutting
clamping
longitudinal groove
tool body
tool according
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
EP86115293A
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German (de)
English (en)
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EP0266447B1 (fr
Inventor
Hans Hench
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Individual
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Individual
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 Individual filed Critical Individual
Priority to EP86115293A priority Critical patent/EP0266447B1/fr
Priority to AT86115293T priority patent/ATE53178T1/de
Priority to DE8686115293T priority patent/DE3671605D1/de
Publication of EP0266447A1 publication Critical patent/EP0266447A1/fr
Application granted granted Critical
Publication of EP0266447B1 publication Critical patent/EP0266447B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B02C18/186—Axially elongated knives

Definitions

  • the invention relates to a rotary cutting tool, in particular for strand pelletizing of plastics, with a cylindrical tool body, which has a number of longitudinally evenly distributed longitudinal grooves, each of which contains a detachable strip-like cutting element and a clamping element which is wedge-shaped in cross section and which in the space between one Support surface of the cutting element and the opposite side wall of the longitudinal groove is arranged and through which the cutting element is braced with a clamping surface opposite the clamping element against a seat in the region of the longitudinal groove.
  • the narrow, strip-like, laterally parallel-flanking knives are rectangular in cross-section Longitudinal grooves of the knife shaft body stretched.
  • wedge-shaped clamping elements are arranged in the longitudinal grooves behind the knives, a movable intermediate holder being held in the knife shaft body in a form-fitting manner for transmitting the clamping force applied by the clamping element being provided between a knife and such a clamping element.
  • the bottom of the longitudinal groove supported clamping elements are tapered in cross section to the circumference of the knife shaft body, so that they are pulled outwards under the influence of the centrifugal forces acting on them during operation and thus increase the clamping force for the knives.
  • the narrow knives are also held in a positive manner in the radial direction without support even with this measuring shaft, the intermediate holder arranged in each longitudinal groove of the knife shaft body meaning additional effort.
  • the object of the invention in contrast, is to provide a concentric cutting tool, in particular for strand pelletizing of plastics, which is distinguished by a particularly simple construction, allows easy and convenient replacement of the cutting elements from the circumferential side of the tool body and, moreover, above all a flawless, ensures secure holding of the cutting tools.
  • the cutting tool mentioned at the outset is characterized in that the support surface of the cutting element and the opposite longitudinal groove side wall delimit a space which tapers in the direction of the circumference of the tool body and the clamping element has a corresponding wedge shape which tapers in the same direction and by means of clamping means supported in the area of the longitudinal groove bottom, radially outward into the wedge-shaped tapering space is pressed in and that the clamping element is supported radially in the region of the seat on the tool body or a part connected to it.
  • the wedge-shaped clamping element is clamped directly between the support surface of the cutting element and the opposite longitudinal groove side wall, there is no need for any intermediate holders or elements, so that the cutting element holder is of a very simple construction.
  • the radial support of the cutting elements towards the outside ensures that the centrifugal forces acting on it during operation are reliably absorbed, so that there is always a correct and correct clamping of the cutting elements in the longitudinal grooves.
  • the assembly and replacement of the cutting elements from the circumferential side of the tool body are effortless: it is sufficient to use a suitable device to press the wedge-shaped clamping element radially inwards against the action of the clamping means or after loosening them in the respective longitudinal groove, with which the clamping element gets rid of its radial support and can be removed freely from the longitudinal groove.
  • the new cutting element only needs to be inserted in the correct position, whereupon the clamping element is made effective, which is pressed radially outwards by its clamping means into the wedge-shaped space between the supporting surface of the cutting element and the opposite longitudinal groove side wall and thus the clamping of the radially supported cutting element on the Tool body guaranteed.
  • the centrifugal forces that then occur during operation cannot affect anyone Release the tension of the cutting elements; at most, they reinforce the clamping forces exerted by the clamping elements.
  • the seat is arranged with its track forming a secant to form a circle representing the outline of the tool body, so that, on the one hand, there are favorable cutting conditions for the cutting elements, and, on the other hand, the radially directed centrifugal forces acting thereon are perpendicular to that Have seat surface acting component that increases the pressure of the clamping surface of the cutting elements on the seat surface.
  • Suitable selection of the position of the plane containing the seat surface with respect to the axis of rotation of the tool body can achieve practically any desired clamping and supporting forces.
  • the support surface and the opposite longitudinal groove side wall can enclose a self-locking acute angle with one another, as a result of which the securing of the holder is further increased.
  • the seat is advantageously formed in or next to a recess of the tool body that extends laterally from the longitudinal groove, the bottom of which has an abutment for the cutting element. This ensures with simple means that after insertion all cutting elements run with their cutting edges on a common flight circle.
  • the bottom of the recess or areas of the tool body circumference can be designed as a contact surface for the cutting element, but embodiments are also conceivable in which adjustable adjusting elements are arranged in the bottom of the longitudinal groove allow to tune the system in particular radially to the respective cutting element.
  • the clamping means pressing the clamping elements radially outwards can have spring means, which in turn can expediently have at least one corrugated spring or at least one spring element made of an elastomeric material.
  • This spring element can be an elongated spring body which is inserted lengthways into the longitudinal groove, but embodiments are also conceivable in which the spring element is a spring pin which is arranged upright on the longitudinal groove base.
  • the spring element can also be at least one spring piston which acts against a gas cushion and acts in the manner of a gas spring.
  • each cutting element that projects into the longitudinal groove and is delimited by the clamping and supporting surface advantageously has a substantially wedge-shaped cross-sectional shape that tapers towards the circumference of the tool body.
  • the clamping and supporting surface can in turn have an acute angle of such a size that on the surfaces of the tool body and the clamping element interacting with them, i. the seat and the support surface, a self-locking effect occurs.
  • the two-legged cutting element is essentially L-shaped in cross-section, at least one of its legs having the wedge-shaped cross-sectional shape.
  • the clamping surface is expediently on the inside of the associated leg arranged.
  • the cutting element designed as an indexable cutting element can have two legs of the same design, each of which carries a cutting edge.
  • the tool body can be solid, at least in the outer peripheral regions, so that the longitudinal grooves are machined directly into the material of the tool body.
  • the longitudinal grooves are each formed in elongate cutting element carriers which are connected to the tool body or are arranged to form parts thereof.
  • the tool body consists of a number of coaxial, annular, axially braced sections and equipped with cutting elements, the cutting elements of which are butt-jointed at the parting joints of the sections, so that the axial length of the cutting tool result in continuous cutting edges.
  • the arrangement is such that adjacent sections on the facing end faces are rotatably connected to one another by fitting elements and spring parts acting in the axial direction are inserted between adjacent sections .
  • the tensioning means can also have at least one tensioning screw coupled to the tensioning element and / or the tool body or a part connected to it, which presses the tensioning element radially outward into the wedge-shaped tapering space.
  • tensioning screws can be present in addition to the spring means already mentioned, but embodiments are also conceivable in which the tensioning means are only formed by such tensioning screws.
  • each clamping screw is inserted into a bore of the clamping element that opens to the circumference of the tool body and is supported against the bottom of the longitudinal groove.
  • the clamping screw arranged in corresponding recesses or bores in the tool body, press against the respective clamping element from below or are inserted into the tool body or its parts, accessible from the side.
  • the support surface of the cutting element with the adjacent longitudinal groove side wall is arranged substantially flush or only slightly protruding beyond the latter into the groove interior.
  • FIG. 1 shows a concentric cutting tool according to the invention, in cross section, in detail and in a schematic representation, illustrating four different embodiments of the spring means assigned to the clamping elements
  • FIG. 2 shows a concentric cutting tool according to the invention, in cross section, in detail and in a schematic representation
  • FIG. 3 shows the arrangement according to FIG. 2, illustrating another embodiment of the cutting elements in a corresponding illustration
  • FIG. 4 shows a multi-part tool body of a rotary cutting tool according to the invention, cut along the line IV-IV of FIG. 5 5, the tool body according to FIG. 4, in a side view
  • FIG. 6 a cutting element carrier for use in the tool body according to FIG.
  • FIG. 7 shows two sections of a rotating cutting tool according to the invention, in a perspective schematic representation, and Figures 9,10 a circular cutting tool according to the invention, in cross section, in detail and in a schematic representation, illustrating a modified embodiment of the cutting elements and a clamping element of the arrangement according to Figure 9, in a side view.
  • the rotary cutting tool shown in FIGS. 1-3 in detail has a solid, essentially sleeve-shaped or circular tool body 1, as is shown in principle in FIG.
  • This tool body 1 is intended - in particular together with other axially connecting, identical tool bodies 1 - to be arranged in a rotationally fixed manner on a shaft which at the end carries shaft journals with which the tool can be rotatably supported in corresponding bearings.
  • the cutting tool is used in particular for strand pelletizing of plastics and is excellently suitable for processing plastics which are difficult to granulate, for example those with admixtures of mineral fibers and the like.
  • the essentially cylindrical tool body 1 is formed on its circumference with a number of evenly distributed longitudinal grooves 2, which extend over the entire axial length of the tool body 1.
  • the longitudinal grooves 2 form a small angle of approximately 2 ° with the axis of rotation of the tool body 1, as is shown somewhat enlarged in FIG. 7 at 3.
  • a recess 4 extends laterally from each of the longitudinal grooves 2, which opens towards the periphery of the tool body 1 and whose side surface forms a seat surface 5 for a cutting element 6, 6a or 6b, which together with a clamping element 7 which is wedge-shaped in cross section, in the longitudinal groove 2 is housed.
  • the strip-like cutting elements 6, 6a, 6b preferably consist of hard metal, stellite or ceramic; they can be constructed in one or more parts, in which case cutting bars made of hard metal or the like are applied, for example soldered, to a corresponding carrier.
  • the cutting elements 6, 6a, 6b are basically arranged in the tool body 1 in such a way that their effective cutting edges 8 run on a common flight circle.
  • each of the cutting elements 6 is essentially L-shaped in cross section. It is therefore two-legged; his two legs are labeled 9 and 10.
  • the two legs 9, 10 are each essentially wedge-shaped in cross-section, the leg 10 lying in the longitudinal groove 2 having a wedge shape tapering towards the peripheral surface of the tool body 1. It is delimited on one side by a clamping surface 11 resting on the seat surface 5 and on the opposite side by a support surface 12, on which the wedge-shaped clamping element 7 acts, which in turn counteracts that of the support surface 12 lying side surface 13 of the longitudinal groove 2 is supported.
  • the cutting element 6 With its leg 10, the cutting element 6 also lies on the base surface 14 of the associated recess 4, which thus forms a stop surface for the cutting element 6.
  • each cutting element 6 and the opposite longitudinal groove side wall 13 is tapered towards the circumference of the tool body 1.
  • the corresponding wedge-shaped clamping element 7, which tapers in the same direction, is pressed into this space by spring means which are arranged between the underside of the clamping element 7 and the bottom 15 of the longitudinal groove 2.
  • FIG. 1 Of these spring means, four different embodiments are illustrated in FIG. 1, which can be used alternatively:
  • the spring means are formed by at least one spring element made of an elastomeric material in the form of an elongated, cylindrical spring body 16, which is inserted lengthways into the longitudinal groove 2.
  • a corrugated or leaf spring 17 is inserted as a spring element in the longitudinal groove 2 adjoining on the right, while at least one spring piston 18 is arranged in the longitudinal groove 2 following on the right as a spring means projects with a cylindrical piston neck 19 into a gas-filled cylinder space 20 formed in the tool body 1, which is sealed against the piston neck via a corresponding sealing wall 21.
  • the spring piston 18 thus acting against a gas cushion is thus fundamentally similar to a gas spring.
  • the spring means are formed by spring pins 22 made of elastomeric material, which are inserted upright into corresponding bores 23 in the groove base 15.
  • the recesses 4 receiving the legs 10 of the cutting elements 6 are arranged in the tool body 1 in such a way that each seat surface 5 is formed with its trace a secant to form a circle representing the outline of the tool body 1 Centrifugal forces therefore have a component which is at right angles on the seat 5 and which strives to press the leg 10 against the seat 5 with the clamping surface 11.
  • the cutting elements 6 are supported radially on the tool body 1 by the inclined seating surfaces 5 and the cooperating, likewise inclined clamping surfaces 11.
  • each longitudinal groove encloses an acute angle, which results in a self-locking effect for the wedge-shaped clamping element 7, the size of which depends in individual cases on the material pairing that applies to the superimposed surfaces.
  • the clamping and support surface 11 and 12 of each cutting element 6 limit an acute angle of such a size that there is also a self-locking effect.
  • the clamping surface 11 of the cutting elements 6, which are essentially L-shaped in cross section, is arranged on the inner side of the associated leg 10.
  • the L-shaped cross-sectional shape of the cutting elements 6 brings with it the advantage of high stability of the cutting elements, while at the same time the region of the circumference of the tool body 1 which adjoins the cutting edge 8 in the cutting direction and which is, according to experience, particularly highly stressed, by the outer surface of the leg 9 of the respective made of hard metal, etc. existing cutting element is formed and is therefore particularly resistant.
  • flutes 24 are finally formed in the circumferential surface of the tool body 1 in the usual manner.
  • FIG. 2 differs from that according to FIG. 1 in that the cutting elements 6a are designed as so-called indexable cutting elements.
  • the two legs 9, 10 the strip-like cutting elements 6a, which otherwise correspond essentially to the cutting elements 6, are both designed identically; each of them carries a cutting edge 8.
  • Each of the recesses 4 is designed with its seat 5 and its bottom surface 14 to match the shape of the two legs 9, 10, but the contact surface 14a is arranged next to the longitudinal groove 2 on the circumference of the tool body 1.
  • the same parts are therefore provided with the same reference numerals, so that a repeated discussion is unnecessary.
  • the strip-shaped cutting elements 6b are formed in one leg with an essentially wedge-shaped cross-sectional shape, the surfaces 11, 12 which laterally delimit the wedge shape being tapered radially outward.
  • the wedge-shaped clamping element 7 is arranged on the side of the leg 10 of the cutting element 6 or 6a facing away from the cutting edge 8, in the embodiment according to FIG. 3 the arrangement is such that the Clamping element 7 on the clamping surface 11 of the cutting element 6b containing the cutting edge 8, ie attacks on its front.
  • the clamping element 7 is released, which is pressed by the spring means into the wedge-shaped space between the surfaces 12, 13, whereby the cutting element 6, 6a, 6b is clamped with its clamping surface 11 against the seat surface 5 of the tool body 1.
  • the centrifugal forces that occur during operation endeavor to pull the tensioning element 7 outwards, whereby the tension of the cutting elements 6, 6a, 6b is further increased. Because of the inclined position of the seat surfaces 5, which deviates from the radial direction, the cutting elements are, at the same time, as already explained, supported radially outward in a form-fitting manner.
  • the tool body is designed in the manner of a so-called rotor 100.
  • the rotor 100 consists of a number of annular disks 30 which are clamped axially to one another by means of clamping bolts 31 in the manner shown in FIGS. 4 and 7.
  • the arrangement is such that between the two outside Ring washers 30 spacer sleeves 32 are arranged, through which the clamping screws 31 run, which are screwed into corresponding threaded bores 32 of a centrally arranged hub disk 33, on which two further ring washers 30 rest on the end face.
  • the rotor 100 is covered on both end faces by cover caps 34 and, moreover, is placed on a shaft (not shown) in a rotationally fixed manner.
  • the ring disks 30 are provided on their circumference with open-edge grooves 200 which are aligned with one another over the axial length of the rotor 100.
  • Rail-shaped or strip-shaped cutting element carriers 35 as are illustrated in detail in FIG. 6, are inserted into the grooves 200 of adjacent annular disks 30.
  • Each of the cutting element supports 35 has two end flanges 36 which are substantially rectangular in cross section and which have holes 37 for fastening screws 38 which are screwed into corresponding threaded holes 39 on the bottom of the grooves 200 and are adapted to the shape of the grooves 200.
  • each cutting element carrier 35 is chamfered at 40 to ensure that the granulate produced can pass freely.
  • the cutting element carriers 35 are each designed with a continuous longitudinal groove 2 that is in the area between the end flanges 36 has the cross-sectional shape shown in FIGS. 1-3.
  • the respective cutting element 6 (or 6a or 6b) is clamped by a wedge-shaped clamping element 7 in the manner shown in FIGS. 1 and 3.
  • the cutting element carriers 35 arranged on adjacent pairs of annular disks 30 are arranged with their cutting elements 6 butt-abutting, so that continuous cutting edges 8 result over the length of the rotor 100, which include the small angle 3 (FIG. 7) with the rotor axis of rotation 41.
  • Taper dowel pins 42 (FIG. 4) ensure an exact angular alignment of the ring disks 30 relative to one another.
  • the cutting tool consists of several coaxial sections, each of which is formed by a tool body 1, as has already been explained with reference to FIGS. 1-3.
  • These tool bodies 1 are non-rotatably mounted on a common shaft (not shown in FIG. 8) and axially clamped thereon, for example by a threaded ring.
  • a threaded ring Between adjacent sections, each formed by a tool body 1, axially parallel, cylindrical locating pins 44 and locating holes 45 associated therewith are arranged in the region of the end faces facing one another.
  • Dowel pins 44 are provided in corresponding bores 46 compression springs 47, which strive to axially press the tool body 1 apart.
  • the radial support of the cutting elements 6, 6a, 6b on the tool body 1 or the cutting element carrier 35 can also take place in a form-fitting manner by means of an extension 50 of the cutting element, as is indicated schematically in FIG. 1.
  • the cutting element 6, which is essentially L-shaped in cross section, is designed essentially as in FIG. 1.
  • the same parts are also designated here with the same reference numerals and are not further explained in detail.
  • the recess 4 is so deep in the circumferential direction of the tool body 1 that the leg 10 of the cutting element 6 tapering in a wedge-shaped manner toward the circumferential surface of the tool body 1 is received essentially entirely in the recess 4.
  • Its support surface 12 projects only slightly beyond the adjacent longitudinal groove side wall into the interior of the longitudinal groove 2.
  • the tensioning element 7 with a laterally projecting shoulder resting on the support surface 12, it could also be aligned with the adjacent longitudinal groove side wall.
  • the wedge-shaped clamping element 7 has two bores 52 arranged at a distance, which open to the circumference of the tool body 1 and each of which receives a clamping screw 51.
  • the clamping screw 51 is screwed into a threaded bore 53 in the bottom of the bore 52 and is supported against the bottom 15 of the longitudinal groove 2.
  • Spring elements can be arranged between the tensioning screws 51, as explained in detail with reference to FIG. 1, but it is also possible to dispense with these spring elements in certain applications.
  • the clamping screws 51 provided with a hexagon socket are loosened through the bore 52 from the circumference of the tool body, so that the clamping element 7 can be pushed downwards in the longitudinal groove 2.
  • the support surface 12 of the cutting element 6 because of its wedge-shaped shape, to the extent that the cutting element 6 with its wedge-shaped leg 10 can be removed from the recess 4 towards the circumference of the tool body.
  • the clamping screws 51 need to be tightened, which, on the longitudinal groove bottom 15, press the clamping element 7 radially outward via their thread and thus clamp the cutting element 6.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Milling Processes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP86115293A 1986-11-05 1986-11-05 Dispositif de coupe rotatif, en particulier pour un granulateur de matière plastique Expired - Lifetime EP0266447B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP86115293A EP0266447B1 (fr) 1986-11-05 1986-11-05 Dispositif de coupe rotatif, en particulier pour un granulateur de matière plastique
AT86115293T ATE53178T1 (de) 1986-11-05 1986-11-05 Rundlaufendes schneidwerkzeug, insbesondere zum stranggranulieren von kunststoffen.
DE8686115293T DE3671605D1 (de) 1986-11-05 1986-11-05 Rundlaufendes schneidwerkzeug, insbesondere zum stranggranulieren von kunststoffen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86115293A EP0266447B1 (fr) 1986-11-05 1986-11-05 Dispositif de coupe rotatif, en particulier pour un granulateur de matière plastique

Publications (2)

Publication Number Publication Date
EP0266447A1 true EP0266447A1 (fr) 1988-05-11
EP0266447B1 EP0266447B1 (fr) 1990-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115293A Expired - Lifetime EP0266447B1 (fr) 1986-11-05 1986-11-05 Dispositif de coupe rotatif, en particulier pour un granulateur de matière plastique

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Country Link
EP (1) EP0266447B1 (fr)
AT (1) ATE53178T1 (fr)
DE (1) DE3671605D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344348A1 (fr) * 1988-06-02 1989-12-06 Hans Hench Couteaux rotatifs pour la granulation des matériaux plastiques
EP0377060A1 (fr) * 1989-01-03 1990-07-11 Hans Hench Outil de coupe rotatif, en particulier pour la granulation de rubans de matière synthétique
US5042733A (en) * 1990-08-06 1991-08-27 Hans Hench Rotary cutter, particularly for granulating plastic material
US6533200B2 (en) 1998-05-12 2003-03-18 Paeper Bernd Arrangement of seats for knives on a cutting shaft in a shredding machine
CN103120977A (zh) * 2013-03-27 2013-05-29 湖南朝晖环境科技有限公司 一种多爪废料破碎机用组合便拆式刀具

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006042255B4 (de) * 2006-09-08 2014-02-13 Komptech Gmbh Zerkleinerer

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE930839C (de) * 1951-10-11 1955-07-25 Westfalia Dinnendahl Groeppel Rotor fuer Schleudermuehlen
US2747803A (en) * 1952-07-09 1956-05-29 Pettibone Mulliken Corp Hammer rotor for hammermills
FR2113138A7 (fr) * 1970-10-23 1972-06-23 Nivoba Bv
DE2208687B1 (de) * 1972-02-24 1973-06-14 Hombak Maschinenfab Kg Messerwelle für Holzbearbeitungsmaschinen
FR2180088A1 (fr) * 1972-04-14 1973-11-23 Holthuis Johannes
FR2218945A1 (fr) * 1973-02-23 1974-09-20 Kampf Maschf Erwin
FR2263820A1 (fr) * 1974-03-15 1975-10-10 Hazemag Andreas Kg
US4068694A (en) * 1975-07-14 1978-01-17 Hombak Maschinenfabrik Kg Cutter shaft for wood machining apparatus
US4219291A (en) * 1979-03-14 1980-08-26 Hoeh James A Segmented helical rotary cutter and method of making same
US4360168A (en) * 1978-12-21 1982-11-23 Conair, Inc. Rotary blade assembly for pelletizer assembly

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE930839C (de) * 1951-10-11 1955-07-25 Westfalia Dinnendahl Groeppel Rotor fuer Schleudermuehlen
US2747803A (en) * 1952-07-09 1956-05-29 Pettibone Mulliken Corp Hammer rotor for hammermills
FR2113138A7 (fr) * 1970-10-23 1972-06-23 Nivoba Bv
DE2208687B1 (de) * 1972-02-24 1973-06-14 Hombak Maschinenfab Kg Messerwelle für Holzbearbeitungsmaschinen
FR2180088A1 (fr) * 1972-04-14 1973-11-23 Holthuis Johannes
FR2218945A1 (fr) * 1973-02-23 1974-09-20 Kampf Maschf Erwin
FR2263820A1 (fr) * 1974-03-15 1975-10-10 Hazemag Andreas Kg
US4068694A (en) * 1975-07-14 1978-01-17 Hombak Maschinenfabrik Kg Cutter shaft for wood machining apparatus
US4360168A (en) * 1978-12-21 1982-11-23 Conair, Inc. Rotary blade assembly for pelletizer assembly
US4219291A (en) * 1979-03-14 1980-08-26 Hoeh James A Segmented helical rotary cutter and method of making same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344348A1 (fr) * 1988-06-02 1989-12-06 Hans Hench Couteaux rotatifs pour la granulation des matériaux plastiques
US4930710A (en) * 1988-06-02 1990-06-05 Hans Hench Rotary cutter, particularly for comminuting plastic material
EP0377060A1 (fr) * 1989-01-03 1990-07-11 Hans Hench Outil de coupe rotatif, en particulier pour la granulation de rubans de matière synthétique
US5042733A (en) * 1990-08-06 1991-08-27 Hans Hench Rotary cutter, particularly for granulating plastic material
US6533200B2 (en) 1998-05-12 2003-03-18 Paeper Bernd Arrangement of seats for knives on a cutting shaft in a shredding machine
CN103120977A (zh) * 2013-03-27 2013-05-29 湖南朝晖环境科技有限公司 一种多爪废料破碎机用组合便拆式刀具

Also Published As

Publication number Publication date
ATE53178T1 (de) 1990-06-15
DE3671605D1 (de) 1990-07-05
EP0266447B1 (fr) 1990-05-30

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