EP0064596B1 - Broyeur granulateur pour le broyage de carottes, de pièces moulées par injection, de corps creux soufflés, etc. - Google Patents

Broyeur granulateur pour le broyage de carottes, de pièces moulées par injection, de corps creux soufflés, etc. Download PDF

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Publication number
EP0064596B1
EP0064596B1 EP82102734A EP82102734A EP0064596B1 EP 0064596 B1 EP0064596 B1 EP 0064596B1 EP 82102734 A EP82102734 A EP 82102734A EP 82102734 A EP82102734 A EP 82102734A EP 0064596 B1 EP0064596 B1 EP 0064596B1
Authority
EP
European Patent Office
Prior art keywords
rotor
cutting
mill according
plates
edge
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
Application number
EP82102734A
Other languages
German (de)
English (en)
Other versions
EP0064596A3 (en
EP0064596A2 (fr
Inventor
Bjarne T. Steffensen
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.)
Colortronic Reinhard GmbH and Co KG
Original Assignee
Colortronic Reinhard GmbH and Co KG
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
Priority claimed from DK202481A external-priority patent/DK202481A/da
Priority claimed from DE19823201096 external-priority patent/DE3201096C2/de
Application filed by Colortronic Reinhard GmbH and Co KG filed Critical Colortronic Reinhard GmbH and Co KG
Priority to AT82102734T priority Critical patent/ATE20579T1/de
Publication of EP0064596A2 publication Critical patent/EP0064596A2/fr
Publication of EP0064596A3 publication Critical patent/EP0064596A3/de
Application granted granted Critical
Publication of EP0064596B1 publication Critical patent/EP0064596B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/469—Perforated sheet-like material
    • 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
    • B02C18/148—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers specially adapted for disintegrating plastics, e.g. cinematographic films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • B02C2023/165—Screen denying egress of oversize material

Definitions

  • the invention relates to a cutting mill for crushing sprues with a roller-shaped, driven rotor mounted in a housing, over the circumference of which several cutting element groups are arranged offset from one another, which interact with at least one knife provided in the housing, with an additional device in front of the knife in the feed direction is provided for increasing the throughput, and with a sieve extending over part of the circumference of the rotor for separating the ground material.
  • Such a cutting mill is known from DE-B-1 168220.
  • this document contains no information about the speed of the machine. It must be assumed that the machine works at a normal speed of 1,500 rpm, for example. If this were not the case, the sharp-edged cams 3 would not be able to develop the mode of operation mentioned in the description of this publication, as described, for example, in column 4, lines 13 to 21.
  • the centrifugal effect of the rotating knives which is expressly mentioned at this point, by means of which the material is controlled against the accumulation surfaces and cutting edges of the cams, so that the regrind is split by the force of the impact or impact, actually occurs only in the known high-speed mills.
  • the focus is on improving the throughput.
  • the open rotor construction for the cutting knives used in the known mill would require a collection of pre-broken and depending on the size of not yet broken sprues in the cavity of the open rotor at low speeds, so that in this way a blockage of the screen space occurs, which further Use of such a facility would make impossible.
  • DE-A-2 216 640 describes a cutting mill rotor in the form of a roller runner for comminuting large compact lumps of plastic.
  • the rotor carries groups of knives with axially parallel blades, these knives being divided into several sections over the length of the rotor and the axially adjacent sections being circumferentially offset from one another in order that, when the cutting mill is in operation, individual cutting knives on the cutting mill rotor engage the standing knife in succession allow.
  • the known cutting mills usually work at speeds of rotation between about 1,000 and 1,500 rpm. Such cutting speeds are acceptable for shredding large, compact chunks of plastic. Such high cutting speeds are unfavorable for crushing sprues and injection molded parts, since the less compact, varied material of sprues springs back from injection molding machines, eludes the cutting process and sprays out of the cutting gap again, so that protective covers have to be provided over the cutting mills in order to cut the material catch, to reduce noise and also to avoid unwanted dust.
  • the described devices for crushing sprues of injection molding machines for their re-supply as regrind in the injection cycle have the disadvantages described of a relatively large noise and dust development. These disadvantages can only be countered by appropriate insulation of the housing, dust caps and the like.
  • the overall height of the known granulators is so great that it is usually not possible to accommodate them under an injection molding machine because the space available there (approx. 500 to 600 mm) in most cases it is not sufficient to position the granulator at this point.
  • This goal is achieved with a cutting mill of the type mentioned at the outset by means of claim 1.
  • the fact that the roller-shaped cutting knife rotor can be rotated at a relatively low speed means that the problem of undesirable noise and dust development can be handled in a simple manner.
  • the essential improvement according to the invention of previously known cutting mills for the stated purpose consists in the additional arrangement for holding before crushing and drawing in the sprues and injection molded parts in the drawing-in direction in front of the knife.
  • This device preferably consists of plate-shaped elements which are arranged orthogonally to the axis of the cutting knife rotor in the housing.
  • the plates lie with their feed edges slightly outside the path of the cutting edges of the cutting knives on the rotor and, thanks to their arrangement, ensure a more even and effective insertion of the sprues and injection molded parts into the area of the knife.
  • the plates are preferably arranged equidistantly and in a number which corresponds approximately to the number of cutting knife arrangements lying next to one another on the roller-shaped rotor. However, the number of plates of the feed device can also be somewhat less.
  • the angular position of the plates, which are preferably orthogonal to the axis of the rotor, can also be arranged obliquely in order to better prevent the parts to be shredded from springing back.
  • the feed device can be provided with special baffles, for example in the form of teeth, on the feed edge of the plates.
  • teeth can be replaced or supported by ribs which are formed on the roller-shaped rotor with the cutting blades themselves, for example by removing the outer surface of the rotor and replacing it with ribs which are parallel to the axis.
  • ribs can work together or together with the toothing on the leading edges of the plates of the feed device and thus ensure a particularly efficient comminution or feeding of hollow bodies into the area of the knife of the cutting mill.
  • the curve shape of the plates of the feed device can be designed differently: In general, a tapering gap will be aimed at the knife, the insertion plates gently springing back from the beginning of the feed area and running back against the housing.
  • these feed elements can also be designed so that a more or less sharp-edged configuration of the plate is provided in the area of the first interaction between the material to be shredded and the tool, by means of which a shredding is already carried out here.
  • the gap between the sharp edge and the knife can converge. However, it can also expand somewhat at first, only to then converge in the area of the level meter.
  • the stub axle of the rotor can be extended along the rotor axis beyond the front end face of the housing (not shown in FIG. 1) and there carry a V-belt wheel for direct drive of the conveyor belt.
  • Particularly low-dust regrind has been achieved with a cutting mill in which the sieve for separating the regrind is provided with openings which are both against the interior, i.e. towards the knife rotor and outside, i.e. to the collection container in the housing.
  • the cutting mill shown in FIG. 1 consists of a roller-shaped driven rotor 1, which is mounted in the housing 2 in a known manner.
  • the housing which is rectangular in cross section, consists of the front wall 3, the rear wall 4, the rear left end face 5, a corresponding front end face which has been broken away for a better view, the flat inclined bottom 6 with the oblique side walls 7 and 8 and one in the drawing Not shown attachment in the form of a funnel or the like.
  • the roller-shaped rotor is driven by a drive motor, also not shown in the drawing, preferably with the interposition of a corresponding reduction gear, in order to achieve the desired low number of revolutions of about 100 rpm.
  • the bearing of the rotor is also not shown. The rotor rotates about the axis 9 and is mounted in corresponding bearings with the stub shaft shown in the drawing.
  • the rotor shown in Fig. 1 has four cutting element groups 10, 11, 12 and 13. Each group consists of three knife plates 10a, 10b, 10c, 11a, 11b, 11c, 12a, 12b, 12c and 13a, 13b, 13c, evenly distributed over the circumference of the rotor. Due to the equidistant arrangement of the knife plates of a cutting element group and the uniform angular offset between adjacent cutting element groups, in the exemplary embodiment of the cutting mill according to the invention shown in FIGS. 1 and 2, there is an angular offset of 30 ° between successive knife plates in their cutting process on the stationary knife, as can be seen from FIG 2 can recognize.
  • the housing 2 is divided into two housing halves by the standing knife 14 and the opposite sieve carrier web 16: in a lower collecting space 37, which is located under the sieve 15 and by parts of the side walls 3, 4, 5, the inclined bottom 6 and the likewise inclined Side walls of the bottom 7 and 8 is limited.
  • this collecting space 37 the shredded material which has passed through the openings 32 of the sieve 15 is collected and discharged through a process not shown in the drawing.
  • This process can be connected to a mechanical, pneumatic or other suitable conveying device which feeds the shredded material back into the specification or mixing funnel for the injection molding machine.
  • the upper housing part is delimited by the rotor part, which protrudes above the level of the leveling knife 14 and the sieve carrier web 16, by the end faces of the housing and the guide plates 18 and 19 and the protruding part of the front wall 3 and the rear guide plates 21 and 22, whereby the upper diagonally inclined downward baffle feeds the material to be shredded to the rotor and the lower cylindrical baffle in the feed area of the material to be shredded is approximately opposite the roller surface of the rotor and is adapted to the cylinder shape. From this guide plate combination 21, 22, which is supported by the tubular support 23, guide plates 24, 24 'protrude, which lie in orthogonal planes to the rotor axis 9.
  • the additional device 20 for holding and pre-shredding in front of the leveling knife 14 is thus essentially formed by the tubular support 23 which supports the guide plates 21 and 22 and a plurality of guide plates 24, 24 ', preferably evenly distributed over the length of the housing 2, the guide plates preferably lying in planes perpendicular to the rotor axis 9. However, they can also converge somewhat in the direction of the stationary knife 14, in particular in the central region of the housing, in order to prevent the material to be comminuted from accumulating in the lateral regions in the vicinity of the end walls 5 of the housing 2.
  • the number of guide plates 24, 24 ' depends on the type of injection molded parts to be shredded, on the width of the individual knife plates on the rotor 1 and will expediently be equal to or less than the number of knife groups lying side by side on the rotor.
  • the essence of the additional device 20 is the holding and pre-shredding of the sometimes very tough and bulky sprues that are fed to the shredding on the knife 14.
  • FIGS. 3 and 4 further exemplary embodiments of the cutting mill according to the invention are shown, with all parts except the guide plates being the same in FIGS. 3 and 4 and therefore not requiring further explanation, and additionally the shape in FIG. 5 of the rotor is modified.
  • the guide plates 25, 25 'in FIG. 3 differ from the guide plates of the exemplary embodiment according to FIG. 2 in that a sharp guide plate corner or a tooth 25b adjoins the edge part 25a of the guide plates, which is particularly useful for pre-crushing the material to be shredded is then suitable if it projects into the path of the knives of the rotor 1 as far as the stationary knife 14 or in any case up to the cutting path of the knives 10a, 10b, 10c.
  • the course of the further plate edge 25c is designed in such a way that the space between the rotor and the edge initially widens and then tapers again to the level knife 14.
  • the embodiment of a cutting mill according to FIG. 4 is particularly suitable.
  • the guide plates 26, 26 '.... in addition to the edges 26b, 26'b ... are included provided with a toothing directed against the edge 14a of the leveling knife 14 to increase the holding force in the feed direction.
  • the subsequent knife 10a pushes the hollow body 28 into the gap between the toothed edge 26c and the surface of the rotor 1 until the hollow body 28 is clamped in this area and then by the subsequent cutting edges of the knives 10a, 10b, 10c are reduced to the necessary particle size which is desired for the regenerate.
  • the cylinder of the rotor 1 is flattened between adjacent knives of each cutting element group and provided with additional ribs 29a, 30a, 31a. These ribs improve the conveying action of the roller of the rotor for the material to be shredded against the stationary knife 14.
  • the associated guide plates can be smooth, as shown in FIG. 5, wherein the concavely curved edge 27c opposite the rotor can run concentrically to the axis 9. However, like the edge 24c in the exemplary embodiment according to FIG. 2, this edge can also widen outwards, the configuration of the exemplary embodiment according to FIG. 3 with edge 25b and a widening interior space, or else the configuration according to FIG. 4 with an additional toothing and edge Have 26b.
  • the material generated can be used to optimize the guide plates in the direction of the desired holding and pre-shredding effect.
  • the cutting mill according to the invention can also be constructed in such a way that the guide plates 24, 25, 26 and 27 are designed to be interchangeable by providing them with corresponding cutouts or guides and plugging them onto the tubular support and into corresponding slots in the guide plates 21 and 22 and corresponding guides on the rear wall 4 and also in the knife 14.
  • the screen 15 is expediently provided with chamfered extensions 33, 34 both on the side 35 facing the rotor 1 and on the side 36 facing away from the collecting space 37, as shown in FIG. 6.

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

Claims (10)

1. Broyeur à couteaux pour fragmenter des culots comportant un rotor cylindrique (1) entraîné et monté dans un boîtier (2), sur le pourtour duquel sont agencés plusieurs groupes d'éléments coupants (10 à 13) décalés les uns par rapport aux autres et coopérant avec au moins un couteau fixe (14) prévu dans le boîtier, un dispositif supplémentaire (20) destiné à augmenter le débit étant prévu dans la direction d'introduction devant le couteau fixe, et coopérant également avec un tamis (15) s'étendant sur une partie du pourtour du rotor destiné à séparer la matière broyée, caractérisé par le fait que le dispositif supplémentaire (20) destiné à augmenter le débit est constitué de plusieurs plaques de guidage (24, 24') réparties de préférence sur la longueur du boîtier de manière uniforme, lesquelles plaques sont perpendiculaires à l'arbre du rotor et sont dirigées contre le couteau fixe (14) pour améliorer l'introduction et que le rotor (1) est entraîné par une faible vitesse de rotation inférieure à 500 tours/min., de préférence d'une valeur d'environ 100 tours/min.
2. Broyeur à couteaux suivant la revendication 1 caractérisé par le fait que le rotor cylindrique (1) porte l'un à côté de l'autre 3 à 5 groupes d'éléments coupants (10 à 13) sous forme de plaques à couteaux fixées sur le rotor, où chaque groupe individuel est constitué de 2 à 4 plaques à couteaux (10a, 10b, 10c) et les groupes d'éléments coupants avoisinants (p.e. 10, 11) présentent un écart angulaire l'un par rapport à l'autre de sorte que l'on obtienne une cadence de coupe équidistante des plaques à couteaux rotatifs (10 à 13) par rapport au couteau fixe (14).
3. Broyeur à couteaux suivant l'une des revendications 1 ou 2, caractérisé par le fait que le dispositif supplémentaire (20) destiné à augmenter le débit est toujours formé de déflecteurs (21, 22) soutenus par un support tubulaire (23).
4. Broyeur à couteaux suivant une quelconque ou plus d'une des revendications 1 à 3, caractérisé par le fait que la fente d'introduction converge légèrement vers le couteau fixe (14).
5. Broyeur à couteaux suivant une quelconque ou plus d'une des revendications 1 à 4, caractérisé par le fait que le nombre des plaques (24, 24') est égal ou inférieur au nombre des groupes d'éléments coupants (10 - 13) sur le rotor (1).
6. Broyeur à couteaux suivant une quelconque ou plus d'une des revendications 1 à 5, caractérisé par le fait que l'arête de la plaque de guidage (24c, 24'c ou 26c, 26'c) au voisinage du rotor (1) est construite de manière à ce qu'elle converge vers l'arête coupante (14a) du couteau fixe (14). (fig. 2 ou fig. 4).
7. Broyeur à couteaux suivant une quelconque ou plus d'une des revendications 1 à 5, caractérisé par le fait que l'arête des plaques de guidage (25, 25') s'étend dans la zone supérieure à partir du bord du boîtier (2) vers le bas, d'abord via une zone légèrement arrondie (25a, 25'a), ensuite via des dents (25b, 25'b) au voisinage de la trajectoire des couteaux dans une zone (25c, 25'c) s'élargissant d'abord puis se rétrécissant ensuite en direction de l'arête coupante (14).
8. Broyeur à couteaux suivant une quelconque ou plus d'une des revendications 1 à 6, particulièrement pour fragmenter des corps creux soufflés et corps similaires, caractérisé par le fait que les plaques de guidage (26, 26') sont munies sur leurs arêtes (26c, 26'c) voisines du rotor (1) d'une denture dirigée contre l'arête (14a) du couteau fixe (14) pour augmenter la force de retenue dans le sens d'introduction et d'une arête (26b, 26'b).
9. Broyeur à couteaux suivant une quelconque ou plus d'une des revendications 1 à 8, caractérisé par le fait que le cylindre du rotor (1) entre des couteaux voisins (par exemple 10a, 10b, 10c) de chaque groupe d'éléments coupants (10, 11, 12, 13) est aplati et muni de nervures supplémentaires (par exemple 29a, 30a, 31 a) (fig. 5).
10. Broyeur à couteaux suivant une quelconque ou plus d'une des revendications 1 à 9, caractérisé par le fait que les alésages (32) pratiqués dans le tamis (15) présentent aussi bien sur la partie (35) tournée vers le rotor (1) que sur la partie opposée (36) dirigée vers l'enceinte collectrice (37) des élargissements (33, 34) chanfreinés.
EP82102734A 1981-05-07 1982-03-31 Broyeur granulateur pour le broyage de carottes, de pièces moulées par injection, de corps creux soufflés, etc. Expired EP0064596B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102734T ATE20579T1 (de) 1981-05-07 1982-03-31 Schneidmuehle zum zerkleinern von anguessen, spritzgussteilen, geblasenen hohlkoerpern ud. dgl.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK202481A DK202481A (da) 1981-05-07 1981-05-07 Kvaern til granulering af plastaffald fra sproejtestoebemaskiner
DK2024/81 1981-05-07
DE19823201096 DE3201096C2 (de) 1982-01-15 1982-01-15 Schneidmühle zum Zerkleinern von Angüssen
DE3201096 1982-01-15

Publications (3)

Publication Number Publication Date
EP0064596A2 EP0064596A2 (fr) 1982-11-17
EP0064596A3 EP0064596A3 (en) 1983-05-18
EP0064596B1 true EP0064596B1 (fr) 1986-07-02

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EP82102734A Expired EP0064596B1 (fr) 1981-05-07 1982-03-31 Broyeur granulateur pour le broyage de carottes, de pièces moulées par injection, de corps creux soufflés, etc.

Country Status (3)

Country Link
US (1) US4545539A (fr)
EP (1) EP0064596B1 (fr)
DE (1) DE3271876D1 (fr)

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US4669673A (en) * 1984-09-04 1987-06-02 John W. Wagner Apparatus for cutting disposable containers
US4687144A (en) * 1986-06-13 1987-08-18 Irwin Research & Development, Inc. Apparatus for comminuting waste materials
US5273218A (en) * 1990-08-20 1993-12-28 Burns Leslie L Falcon hog
CA2119741C (fr) * 1991-09-30 2000-06-27 Mark J. Potter Microfiltration de zeolites
US5881959A (en) * 1995-05-04 1999-03-16 Cmi Corporation Materials grinder with infeed conveyor and anvil
US5775608A (en) * 1997-04-07 1998-07-07 Dumaine; Thomas J. Reversible granulator
US6405949B1 (en) 1998-10-28 2002-06-18 Stephen B. Maguire Shuttle granulator
US20030075626A1 (en) * 1998-10-28 2003-04-24 Maguire Stephen B. Shuttle granulator
DE10113953C1 (de) * 2001-03-22 2002-08-14 Transport & Lagertechnik Vorrichtung zum Zerkleinern von Kunststoffgebilden mit geringer Materialstärke
US6749138B2 (en) * 2002-03-05 2004-06-15 Phoenix Technologies, L.P. Granulator
US7270285B2 (en) * 2005-05-24 2007-09-18 Blue Sheep Llc Band cutting system
DE102005037668B4 (de) * 2005-08-05 2007-10-25 Vecoplan Maschinenfabrik Gmbh & Co. Kg Zerkleinerungsvorrichtung mit Drehstrom-Synchronmotor und integrierter Umlaufgetriebestufe
DE102005062963A1 (de) * 2005-12-28 2007-07-12 Vecoplan Maschinenfabrik Gmbh & Co. Kg Zerkleinerungsvorrichtung mit reduzierter Lagerzahl
DE102009019869B4 (de) * 2009-05-06 2012-09-06 Hosokawa Alpine Ag Gehäuse für verfahrenstechnische Maschinen und Apparate
US8740121B1 (en) * 2009-06-19 2014-06-03 Republic Machine, Inc. Rotary grinder/shredder
ITLC20110008A1 (it) * 2011-09-19 2011-12-19 Andrea Corbetta Vaglio per macinatori
DE102013114782B3 (de) * 2013-12-23 2015-04-02 Vecoplan Ag Zerkleinerungsvorrichtung mit einem Drehstrom-Asynchronmotor und einem kraftschlüssigen Zugmittelgetriebe sowie Verfahren zu dessen Betrieb
CN104624295B (zh) * 2015-02-12 2017-05-17 大埔县汇丰源陶瓷工艺有限公司 含有滚珠和滚轮的陶瓷制造用粉体制备装置及其使用方法
CN109392975B (zh) * 2018-10-30 2021-04-09 管浠皓 一种多功能面类食品成型设备

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Also Published As

Publication number Publication date
DE3271876D1 (en) 1986-08-07
EP0064596A3 (en) 1983-05-18
US4545539A (en) 1985-10-08
EP0064596A2 (fr) 1982-11-17

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