DE2749482A1 - Cutting drum for paper and plastics shredder - has scrapers with pointed ends preventing drum clogging with thermoplastics - Google Patents
Cutting drum for paper and plastics shredder - has scrapers with pointed ends preventing drum clogging with thermoplasticsInfo
- Publication number
- DE2749482A1 DE2749482A1 DE19772749482 DE2749482A DE2749482A1 DE 2749482 A1 DE2749482 A1 DE 2749482A1 DE 19772749482 DE19772749482 DE 19772749482 DE 2749482 A DE2749482 A DE 2749482A DE 2749482 A1 DE2749482 A1 DE 2749482A1
- Authority
- DE
- Germany
- Prior art keywords
- drum
- scrapers
- scraper
- cutting
- clogging
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1818—Means for removing cut-out material or waste by pushing out
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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
- B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
-
- 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
- B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
- B02C2018/0069—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents with stripping devices
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Schneidwalze eines Reißwerkes Cutting roller of a shredding machine
Die Erfindung betrifft eine Schneidwalze eines Reißwerkes einer Maschine zum Vernichten von Papier und dergleichen Abfällen mit einer angetriebenen Welle, auf der kraftschlüssig ringförmige Messer mit Nuten an ihrem Umfang aufsitzen, wobei jeweils zwischen zwei Messern ein gehäusefest montierter Abstreifer angeordnet ist, der mit Vorsprüngen in den Arbeitsbereich der Messer hineinragt.The invention relates to a cutting roller of a ripping mechanism of a machine for shredding paper and similar waste with a driven shaft, sit on the non-positive ring-shaped knife with grooves on its circumference, with a scraper fixed to the housing is arranged between two knives, which protrudes into the working area of the knife with protrusions.
Eine derartige Schneidwalze ist durch die DT-AS 25 26 109 bekannt geworden. Das Reißwerk besteht aus zwei derartig ausgebildeten Schneidwalzen, die derart nebeneinander und achsparallel zueinander angeordnet sind, daß die Messer der beiden Schneidwalzen miteinander kämmen. Die Nuten der einen Schneidwalze arbeiten dabei mit dem Bereich zwischen zwei benachbarten Nuten der anderen Schneidwalze zusammen. Die zwischen jeweils zwei Messern angeordneten Abstreifer streifen das beim Arbeiten entstehende Material vom Bereich der Schneidkanten der Messer ab und verhindern dadurch ein Zusetzen der Messer. Zwischen den beiden Abstreifern steht somit ein Schlitz in Stärke eines Messers.Such a cutting roller is known from DT-AS 25 26 109 become. The ripping mechanism consists of two cutting rollers designed in this way, which are arranged next to one another and axially parallel to one another that the knives of the two cutting rollers comb together. The grooves of one of the cutting rollers work with the area between two adjacent grooves of the other cutting roller together. The scrapers, which are arranged between two knives, brush this off Material produced during work from the area of the cutting edges of the knives and impede thereby a clogging of the knife. Between the two The scraper is therefore a slot the size of a knife.
Es hat sich herausgestellt, daß sich in diese Schlitze, insbesondere beim Reversieren, Partikel festsetzen. Dies gilt insbesondere dann, wenn thermoplastische Materialien, wie Filme, Mikrofilme usw., zerkleinert werden sollen.It has been found that in these slots, in particular when reversing, particles become trapped. This is especially true when thermoplastic Materials such as films, microfilms, etc. are to be crushed.
Das Zusetzen der Schlitze zwischen den Abstreifern führt also zu einer unerwünschten Reibung, die wiederum Anlass zu einer unerwünschten Erwärmung gibt. Dabei ist zu berücksichtigen, daß eine Schneidwalze mehrere hundert Messer und eine gleiche Anzahl von Schlitzen hat. Die Erwärmung kann schließlich zu einer Blockierung der Maschine führen.The clogging of the slots between the scrapers thus leads to a unwanted friction, which in turn gives rise to undesirable heating. It should be noted that a cutting roller has several hundred knives and one has the same number of slots. The warming can eventually cause a blockage the machine.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Schneidwalze der eingangs genannten Gattung vorzuschlagen, bei deren Verwendung es nicht mehr zu einem Blockieren der Maschine kommen kann, auch wenn mit der Maschine thermoplastische Materialien zerkleinert werden sollen.The invention is therefore based on the object of a cutting roller of the genus mentioned at the outset to propose, when using it no longer The machine can jam, even if the machine is thermoplastic Materials are to be crushed.
Zur Lösung dieser Aufgabe ist die Erfindung dadurch gekennzeichnet, daß zwischen den Abstreifern jeweils ein ebenfalls gehäusefester Hilfsabstreifer angeordnet ist.To solve this problem, the invention is characterized in that that between the wipers there is also an auxiliary wiper fixed to the housing is arranged.
Der Hilfsabstreifer streift somit die an den Messern festsitzenden Partikel ab, die in den Spalt zwischen zwei benachbarte Abstreifer kommen wollen. Dadurch wird die zusätzliche Reibung verhindert und damit auch die erwähnte nachteilige Erwärmung.The auxiliary scraper thus brushes those that are stuck on the knives Particles that want to get into the gap between two adjacent scrapers. This prevents the additional friction and thus also the disadvantageous one mentioned Warming.
Bevorzugt wird es, wenn der Hilfsabstreifer mit spitzen Abstreifkanten bis nahe an den Umfang des betreffenden Messers reicht. Die spitzen Abstreifkanten streifen somit bei beiden Drehrichtungen die dort anhaftenden Partikel ab.It is preferred if the auxiliary wiper has pointed wiper edges reaches close to the circumference of the knife in question. The sharp scraper edges thus wipe off the particles adhering there in both directions of rotation.
Die Erfindung wird im folgenden anhand eines Ausführungsbeispieles näher erläutert, aus dem sich weitere wichtige Merkmale ergeben.The invention is illustrated below using an exemplary embodiment explained in more detail, from which other important features result.
Es zeigt: Fig. 1 eine Ansicht eines Abstreifers mit Distanzring; Fig. 2 eine Ansicht eines Hilfsabstreifers mit Messer.It shows: FIG. 1 a view of a scraper with a spacer ring; FIG. Fig. 2 is a view of an auxiliary scraper with a knife.
Die in den beiden Figuren dargestellten Bauteile, nämlich Messer 1, Distanzscheibe 2, Abstreifer 3 und Hilfsabstreifer 4 bilden zusammen einen Satz. Eine Schneidwalze besteht aus einer großen Anzahl derartiger, axial hintereinander angeordneter Sätze. Das Messer 1 hat dabei innen eine kreisrunde Ausnehmung 5, die an einer Seite eine Unrundheit 6 hat. Das Messer ist auf eine entsprechend profilierte, angetriebene Welle aufgesetzt, so daß es kraftschlüssig in beiden Richtungen angetrieben werden kann. Wie erwähnt, kämmen die Messer zweier zusammenarbeitender Schneidwalzen miteinander, wie in der erwähnten DT-AS 25 26 109 beschrieben. Um den hierfür notwendigen axialen Abstand zwischen den Messern zu erreichen, befindet sich zwischen jeweils zwei Messern eine Distanzscheibe 2. Diese ist als Ring ausgebildet. In derselben Ebene der Distanzscheibe 2 befindet sich jeweils ein Abstreifer 3, der eine kreisrunde Ausnehmung hat, die etwas größer ist als der Außenumfang der Distanzscheibe 2. Der Abstreifer 3 hat über seinen Umfang verteilt mehrere Vorsprünge 7, die dazu dienen, das Material zwischen den Schneidkanten 8 der Messer beim Betrieb abzustreifen. Der Abstreifer ist gehäusefest montiert. Hierzu hat er einen Fortsatz 9 mit zwei Löchern 10, mit denen er auf zwei zueinander parallel verlaufende Stangen aufgesetzt ist.The components shown in the two figures, namely knife 1, Spacer 2, scraper 3 and auxiliary scraper 4 together form a set. A cutting roller consists of a large number of such, axially one behind the other arranged Sentences. The knife 1 has inside a circular recess 5 on one side has an out-of-roundness of 6. The knife is driven on a suitably profiled Shaft placed so that it can be positively driven in both directions can. As mentioned, the knives of two cooperating cutting rollers mesh with each other, as described in the aforementioned DT-AS 25 26 109. In order to achieve the necessary axial Achieving distance between the knives is between every two knives a spacer 2. This is designed as a ring. In the same plane as the spacer 2 there is in each case a scraper 3, which has a circular recess that is slightly larger than the outer circumference of the spacer washer 2. The scraper 3 has A plurality of projections 7 distributed over its circumference, which serve to support the material to strip between the cutting edges 8 of the knife during operation. The scraper is fixed to the housing. For this purpose, he has an extension 9 with two holes 10, with which it is placed on two parallel rods.
Um ein Zusetzen des Spaltes zwischen zwei benachbarten Abstreifern 3 zu verhindern, ist erfindungsgemäß zwischen jeweils zwei dieser Abstreifer ein Hilfsabstreifer 4 angeordnet, der zwei Löcher 11 hat, die den Löchern 10 des Abstreifers 3 entsprechen. Der Hilfsabstreifer 4 ist also auf dieselben Stangen aufgesteckt wie der Abstreifer 3 und wird dadurch gehäusefest gehalten. Der Hilfsabstreifer hat im wesentlichen eine Kontur entsprechend dem Fortsatz 9 des Abstreifers 3. In Richtung zur Achse des Messers 1 hin ist er aber kreisförmig berandet mit einer Kante 12, die unter geringem radialen Abstand vor der Schneidkante 8 des Messern endet. Durch diese Kante 12 werden zwei spitze Abstreifkanten 13, 14 ausgebildet, die die Partikel bei Betrieb in beiden Drehrichtungen im Spalt zwischen den Abstreifern 3 abstreifen. Alle beschriebenen Teile, nämlich Messer 1, Distanzscheibe 2, Abstreifer 3, Hilfsabstreifer 4, sind aus etwa gleich starken Blechen gefertigt. Die in Fig. 2 gezeigten Bauteile befinden sich also Uber den Bauteilen der Fig. 1 und bilden einen vollständigen Satz.About clogging of the gap between two adjacent scrapers 3 is to prevent according to the invention between two of these scrapers Arranged auxiliary scraper 4, which has two holes 11, which correspond to the holes 10 of the scraper 3 correspond. The auxiliary wiper 4 is therefore attached to the same rods as the scraper 3 and is thereby held fixed to the housing. The auxiliary scraper has essentially a contour corresponding to the extension 9 of the scraper 3. In the direction towards the axis of the knife 1, however, it has a circular border with an edge 12, which ends at a small radial distance in front of the cutting edge 8 of the knife. By this edge 12, two pointed wiper edges 13, 14 are formed, which the particles When operating, wipe in both directions of rotation in the gap between the wipers 3. All parts described, namely knife 1, spacer 2, scraper 3, auxiliary scraper 4, are made from sheet metal of approximately the same thickness. The components shown in FIG are therefore located above the components of FIG. 1 and form a complete Sentence.
Der Abstreifer 3 kann auch mit der Distanzscheibe 2 einstückig ausgebildet sein.The wiper 3 can also be designed in one piece with the spacer disk 2 be.
LeerseiteBlank page
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772749482 DE2749482C2 (en) | 1977-11-04 | 1977-11-04 | Cutting roller of a ripper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772749482 DE2749482C2 (en) | 1977-11-04 | 1977-11-04 | Cutting roller of a ripper |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2749482A1 true DE2749482A1 (en) | 1979-05-10 |
DE2749482C2 DE2749482C2 (en) | 1986-01-09 |
Family
ID=6023058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19772749482 Expired DE2749482C2 (en) | 1977-11-04 | 1977-11-04 | Cutting roller of a ripper |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2749482C2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2502979A1 (en) * | 1981-03-31 | 1982-10-08 | Schleicher Co Feinwerktech | RIPPER FINGER IN THE DEVICE OF A WASTE MACHINE FOR TEXT AND DATA MEDIA |
DE3311331A1 (en) * | 1983-03-29 | 1984-10-11 | Hermann 7777 Salem Schwelling | SCRAPER SYSTEM FOR THE CUTTERS OR TORCH ROLLERS OF PAPER CRUSHERS |
EP0187445A2 (en) * | 1984-11-01 | 1986-07-16 | Cummins-Allison Corporation | A particle type shredding mechanism |
DE3610539A1 (en) * | 1986-03-27 | 1987-10-01 | Hermann Schwelling | Stripping unit for the pair of cutting rollers of a document shredder |
DE3841250A1 (en) * | 1988-12-07 | 1990-06-13 | Multivac Haggenmueller Kg | Packaging machine with a cutting device |
US4944462A (en) * | 1989-05-02 | 1990-07-31 | Cummins-Allison Corp. | Shredder |
EP0774300A1 (en) * | 1995-11-17 | 1997-05-21 | C.M.S. S.p.A. | Compacting and treating device |
EP0795353A1 (en) | 1996-03-14 | 1997-09-17 | SCHLEICHER & Co. INTERNATIONAL AKTIENGESELLSCHAFT | Document shredder |
EP1057532A1 (en) * | 1999-05-11 | 2000-12-06 | Zorab, James | Shredding or fibrillation method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3610537C2 (en) * | 1986-03-27 | 1995-06-29 | Hsm Pressen Gmbh | Scraper for the cutting rollers of document shredders |
EP0239104B1 (en) * | 1986-03-27 | 1991-06-05 | H.S.M. Pressen GmbH | Cutting mechanism for a document shredder |
DE4123293A1 (en) * | 1991-07-13 | 1993-01-21 | Schwelling Hermann | SCRAPER COMB, IN PARTICULAR FOR SMALL SHREDDERS |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2526109A1 (en) * | 1975-06-11 | 1976-12-16 | Schleicher Co Feinwerktech | Sectioning cutter device for use with sheet material - has sets of separator or sensor devices around periphery of cutting blades |
DE2526650A1 (en) * | 1975-06-14 | 1976-12-30 | Wilhelm Haeberle | Shredder for plastic scrap - with staggered counter rotating toothed cutter blades rotating at different speeds |
-
1977
- 1977-11-04 DE DE19772749482 patent/DE2749482C2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2526109A1 (en) * | 1975-06-11 | 1976-12-16 | Schleicher Co Feinwerktech | Sectioning cutter device for use with sheet material - has sets of separator or sensor devices around periphery of cutting blades |
DE2526650A1 (en) * | 1975-06-14 | 1976-12-30 | Wilhelm Haeberle | Shredder for plastic scrap - with staggered counter rotating toothed cutter blades rotating at different speeds |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2502979A1 (en) * | 1981-03-31 | 1982-10-08 | Schleicher Co Feinwerktech | RIPPER FINGER IN THE DEVICE OF A WASTE MACHINE FOR TEXT AND DATA MEDIA |
DE3112666A1 (en) * | 1981-03-31 | 1982-10-14 | Feinwerktechnik Schleicher & Co, 7778 Markdorf | SCRAPER IN THE DRAWING MACHINE OF A TORNING MACHINE FOR TEXT AND DATA CARRIERS |
DE3311331A1 (en) * | 1983-03-29 | 1984-10-11 | Hermann 7777 Salem Schwelling | SCRAPER SYSTEM FOR THE CUTTERS OR TORCH ROLLERS OF PAPER CRUSHERS |
EP0187445A2 (en) * | 1984-11-01 | 1986-07-16 | Cummins-Allison Corporation | A particle type shredding mechanism |
EP0187445A3 (en) * | 1984-11-01 | 1987-05-20 | Cummins-Allison Corporation | A particle type shredding mechanism |
US4693428A (en) * | 1984-11-01 | 1987-09-15 | Cummins Allison Corporation | Particle-type shredding mechanism |
DE3610539A1 (en) * | 1986-03-27 | 1987-10-01 | Hermann Schwelling | Stripping unit for the pair of cutting rollers of a document shredder |
DE3841250A1 (en) * | 1988-12-07 | 1990-06-13 | Multivac Haggenmueller Kg | Packaging machine with a cutting device |
US4944462A (en) * | 1989-05-02 | 1990-07-31 | Cummins-Allison Corp. | Shredder |
EP0774300A1 (en) * | 1995-11-17 | 1997-05-21 | C.M.S. S.p.A. | Compacting and treating device |
EP0795353A1 (en) | 1996-03-14 | 1997-09-17 | SCHLEICHER & Co. INTERNATIONAL AKTIENGESELLSCHAFT | Document shredder |
US5934580A (en) * | 1996-03-14 | 1999-08-10 | Schleicher & Co. International | Document shredder |
EP1057532A1 (en) * | 1999-05-11 | 2000-12-06 | Zorab, James | Shredding or fibrillation method |
Also Published As
Publication number | Publication date |
---|---|
DE2749482C2 (en) | 1986-01-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OD | Request for examination | ||
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8365 | Fully valid after opposition proceedings | ||
8339 | Ceased/non-payment of the annual fee |