EP1533039B1 - Couteau rond ondulatoire et module de couteau pour destructeur de documents - Google Patents
Couteau rond ondulatoire et module de couteau pour destructeur de documents Download PDFInfo
- Publication number
- EP1533039B1 EP1533039B1 EP20040257244 EP04257244A EP1533039B1 EP 1533039 B1 EP1533039 B1 EP 1533039B1 EP 20040257244 EP20040257244 EP 20040257244 EP 04257244 A EP04257244 A EP 04257244A EP 1533039 B1 EP1533039 B1 EP 1533039B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- cambers
- undulating
- round
- blades
- 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.)
- Active
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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
- B02C18/16—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
-
- 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
- B02C18/146—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with a rotor comprising a plurality of axially contiguous disc-like segments each having at least one radially extending cutting element
Definitions
- the present invention relates to an improved cutting blade for a shredder, particularly to a round undulating blade that is integrally formed by punching a sheet metal in a punching die or a round undulating blade module that is integrally formed by die-casting.
- the conventional shredders for cutting paper use a plurality of cutting blades and spacers engaging over a rotary cutter shaft, and the shearing force that two parallel and opposite rotary cutter shafts produce for transferring and cutting the paper-to-be-cut along a longitudinal direction into strips.
- Shredders can be classed into two types, the stripe-cut shredders and crosscut shredders, according to the machine cutting style.
- the former shredders arrange cutting blades to the rotating cutter shafts in a manner to cutting the paper in a longitudinal direction to form strips.
- the later shredders include blades that include more than one cutting edge part, and each cutter is disposed helically along the rotary cutter shaft for first cutting paper along a horizontal direction into strips and then cutting paper along a longitudinal direction into approximate 4 mm ⁇ 40 mm paper chips.
- the conventional blade is made by punching a sheet metal having a thickness of approximately 2 mm into a circular blade by a die.
- the blade includes a polygonal central hole A1 through which a rotary shaft may pass.
- the blade also includes cutting edges A2 that are spaced in about 120 degrees apart around the periphery. As shown, when two blades are arranged on the rotary shafts S in a back-to-back manner to combine into a set of blades A, the cutting edges of the two blades assume a V-like edge A3.
- the blades are formed by a punch die, the die wear that increases with the time will reduce sharpness of the blade edges, which does not improve until replacing the die, to result in inconsistent quality. To ensure quality of the blades, it is necessary to shorten the service term of the die, which results in increment of the cost.
- the thickness of the blade is the same as the width of paper to be cut. To ensure the strength of blades while cutting along the horizontal direction, the blades cannot be too thin, or else the blades tend to deform or fracture. Such a limitation attributes to the high material cost, which is less competitive as compared to the current market price.
- the motor can supply a minimum power for cutting along the horizontal direction, that is, to reduce the power consumed by the motor.
- the width of the paper cut by the conventional blades is 4 mm, the motor needs to output higher power to drive the blades and flanks moving in opposing directions to cut the paper along the horizontal direction smoothly.
- this invention overcomes the shortcoming of the conventional blades.
- It is a primary objective of the present invention is to provide a round undulating blade for shredders, that is integrally punched from a sheet metal in a die into a round undulating blade to effectively reduce the material cost and the weigh of the blade to thereby reduce the motor loading and power consumption.
- It is a further objective of the present invention is to provide two sets of round undulating blade modules for shredders, each of which is constructed of a pair of integrally formed round undulating blades of round undulating blades that are arranged in a face-to-face and back-to-back manner, by die-casting, respectively.
- It is another objective of the present invention is to provide a round undulating blade for shredders, that uses the varying curvatures of the round undulating blade to cut paper into paper chips each having a wider center tapering towards the ends, so as to reduce the power that that motor needs to output for cutting the two ends to thereby reduce the motor loading and the power consumption.
- the present invention provides a round undulating blade for a shredder according to claim 1.
- the present invention provides a round undulating blade module for a shredder according to claim 9.
- the round undulating blade for shredder is characterized in that the cambers are equally spaced or unequally distant from one another.
- the round undulating blade for shredder is characterized in that the flank is formed with at least one rib protruding towards a direction opposing the curvature of the cambers at where the rib is formed.
- the round undulating blade for shredder is characterized in that the at least one rib is formed on the cambers where no hooked edges are formed.
- the round undulating blade for shredder is characterized in that the periphery of the blade is integrally formed into serration.
- the round undulating blade for shredder is characterized in that the center of the blade is formed with a polygonal hole.
- the round undulating blade for shredder is characterized in that the blade is made from a sheet metal punched integrally in a punching die.
- the round undulating blade module for shredder is characterized in that the blade module is integrally formed by die-casting.
- FIG. 3 to 6 where Figs. 3 and 4 illustrate the perspective and planar views of the present invention, respectively, and Figs. 5 and 6 are cross-sectional views taken from lines 5-5 and lines 6-6 in Fig. 4, respectively.
- the above-mentioned views disclose a revolutionized cutting blade 1 for a shredder, which blade is able to provide an optimum sheet capacity based on the various types of shredders.
- the present invention selects a sheet metal having a minimum thickness of about 0.3 mm as a raw material, the selected sheet metal is punched by a die into a blade including an undulating blade flank 12, formed into two cambers B' having a first curvature and two cambers B' having a second curvature alternatively arranged with respect to the cambers B having the first curvature.
- the cambers B, B' are equally spaced apart from one another.
- the cambers B, B' may also be equally spaced apart from each other, if needed.
- the periphery 11, as shown in Fig. 3, of the blade is integrally formed into serration.
- the periphery 11 of serration serves to pull the paper to be cut downwards along a longitudinal direction into strips.
- the cambers B having the first curvature are integrally formed with hooked edges 13 on the periphery 11 thereof for cutting the strips along a horizontal direction into paper chips.
- the cambers B' having the second curvature are not formed with any hooked edges.
- a polygonal hole 16 is formed in a center of the blade 1, through which a rotary shaft may pass.
- a blade is punched in a punching die to form an undulating blade flank 12 including two cambers B having a first curvature and two cambers B' having a second curvature alternatively arranged with respect to the cambers B having the first curvature, wherein the cambers B having the first curvature are integrally formed with hooked edges 13 on the periphery 11 thereof for cutting the strips along a horizontal direction into paper chips, and the cambers B' having the second curvature are not formed with any hooked edges.
- Figs. 10-13 illustrate an embodiment of a round undulating blade 100 of the present invention having six cambers.
- the round undulating blade 100 is punched in a punching die to form an undulating blade flank 112 including three cambers B having a first curvature and three cambers B' having a second curvature alternatively arranged with respect to the cambers B having the first curvature, as shown in Fig. 13, wherein the cambers B having the first curvature are integrally formed with hooked edges 113 on the periphery 111 thereof for cutting the strips along a horizontal direction into paper chips, and the cambers B' having the second curvature are not formed with any hooked edges.
- the periphery 111, as shown in Fig. 10, of the blade is integrally formed into serration.
- the periphery 111 of serration serves to pull the paper to be cut downwards along a longitudinal direction into strips.
- Figs. 14-17 illustrate an embodiment of a round undulating blade 200 of the present invention having eight cambers.
- the round undulating blade 200 is punched in a punching die to form an undulating blade flank 212 including four cambers B having a first curvature and four cambers B' having a second curvature alternatively arranged with respect to the cambers B having the first curvature (Figs. 16 and 17 only illustrate the cambers B), wherein the cambers B having the first curvature are integrally formed with hooked edges 213 on the periphery 211 thereof for cutting the strips along a horizontal direction into paper chips, and the cambers B' having the second curvature are not formed with any hooked edges.
- the periphery 211 as shown in Fig. 14, of the blade is integrally formed into serration.
- the periphery 211 of serration serves to pull the paper to be cut downwards along a longitudinal direction into strips.
- the flank 12 may be formed with a plurality of ribs 50 protruding towards a direction opposing the curvature of the cambers, by punching, at where the ribs are formed, for enhancing anti-flexing capability of the blade 4.
- the ribs 50 are formed on the cambers B' where no hooked edges are provided.
- the ribs 50 may certainly be formed on the cambers B where the hooked edges 13 are provided
- the standardized round undulating blades punched from a sheet metal by a die are arranged sequentially on a first and a second rotary shafts S, S' to be assembled into the rotary cutting tool that is most important for a shredder.
- the round undulating blades are arranged in such a manner that the hooked edges 13 of two adjacent blades 1 are located at the same location, and the hooked edges 13 of the blades 1 on the first rotary shaft S interlace with the hooked edges 13 of the blades 1 on the second rotary shaft S'.
- the two adjacent round undulating blades on the first rotary shaft S are arranged in such a manner where their cambers B having the hooked edges 13 face each other to form a first blade set; the two adjacent round undulating blades on the second rotary shaft S' are arranged in such a manner where their cambers B' without the hooked edges face each other to form a second blade set.
- the first blade set and second blade set assembled by joining two round undulating blades to be mounted on the first rotary shaft S and second rotary shaft S', respectively, may be formed into an integral blade module by die-casting.
- blade modules 60, 70 configured to each have the features of the first blade set or second blade set as described above, as shown in Fig. 18, may be die-cast from their respective dies.
- the blade modules made by die-casting may accommodate heavy-duty shredders in exchange for their higher cost of manufacturing.
- the first blade 21 and the second blade 22 on a first rotary shaft S are arranged in such a manner where their cambers B having the hooked edges 13 face each other to form a first blade set.
- the flanks of the blades 21, 22 each include two cambers B having a first curvature and two cambers B' having a second curvature alternatively arranged with respect to the cambers B having the first curvature, the cambers B having the hooked edges 13 of the first blade 21 and second blade 22 join to contact each other while the cambers B' without the hooked edges of the first blade 21 and second blade 22 are separated from each other to assume an open space 23.
- first blade 31 and the second blade 32 on the second rotary shaft S' are arranged in such a manner where their cambers B' without the hooked edges face each other to form a second blade set.
- the flanks of the blades 31, 32 each include two cambers B having a first curvature and two cambers B' having a second curvature alternatively arranged with respect to the cambers B having the first curvature, the cambers B having the hooked edges 13 of the first blade 31 and second blade 32 are separated from each other to assume an open space 33, while cambers B having the hooked edges 13 of the second blade 32 and a first blade 31' of an adjoining second blade join to contact each other.
- the standardized round undulating blades each including two cambers having a first curvature and two cambers having a second curvature alternatively arranged with respect to the cambers having the first curvature, enable the flanks of the corresponding blade sets to maintain a certain contact gap at all time by means of the varying curvatures of the blades.
- the superposition of the blades arranged on different rotary shafts are constant. Such a constant superposition can ensure scissors like cutting effects between the flanks 12 when the two rotary shafts S, S' rotate in opposing directions (shown in Fig. 9).
- the hooked edges 13 will cooperate with the flanks 12 on the cambers B' of the mating blades to cut off the paper strips.
- the paper is fragmented into paper chips each having a wider center tapering towards the ends. Because of the two ends of the paper chip are the horizontal cutting positions, the narrower width of cross-section is, and the smaller output power is needed to cut along the horizontal direction.
- the motor can supply a minimum power for cutting along the horizontal direction under a minimum load. The reduction in the motor load also reduces the power consumption and increases service-life of the motor.
- the round undulating blade of the present invention may be punched from a sheet metal having a minimum thickness of about 0.3 mm, where the costs of the two materials are significantly different, and the reduced weight also helps to further reduce the power that the motor needs to supply to thereby increase the service life of the motor and reduce the power consumption.
- the round undulating blade module made by die-casting may be easily manufactured. These characteristics all help to reduce the manufacturing cost and enhance the market competitiveness.
- the present invention discloses a blade punched from a sheet metal, as well as a blade module that is die-cast to form blades.
- each blade includes at least two cambers having a first curvature and at least two cambers having a second curvature alternatively arranged with respect to the cambers having the first curvature.
- the periphery of the blade is integrally made into serration to serve as a flank for cutting paper along a longitudinal direction.
- the periphery of the cambers having the first curvature is integrally formed with hooked edges for cutting the paper along a horizontal direction to form paper chips having double-tapering ends.
- the revolutionized construction of the present invention reduces power consumption, material cost, and lessens motor load, so as to enhance the market competitiveness of the shredder.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
Claims (11)
- Lame circulaire ondulante (1) pour une décliqueteuse, comprenant :une périphérie (11) ;un flanc de lame ondulante (12), comprenant au moins deux cambrures (B) présentant une première courbure et au moins deux cambrures (B') possédant une seconde courbure agencées en alternance par rapport aux cambrures présentant la première courbure ; etdes arêtes crochues (13) formées sur la périphérie des cambrures présentant la première courbure.
- Lame circulaire ondulante selon la revendication 1, dans laquelle le flanc de lame ondulante (12) de la lame sert à couper du papier le long d'une direction longitudinale pour former des bandes de papier possédant une extrémité à double effilement, et les arêtes crochues (13) servent à couper les bandes le long d'une direction horizontale pour obtenir des copeaux de papier.
- Lame circulaire ondulante selon la revendication 1 ou la revendication 2, dans laquelle les cambrures (B, B') sont espacées de façon égale l'une de l'autre.
- Lame circulaire ondulante selon l'une quelconque des revendications précédentes, dans laquelle le flanc est formé avec au moins une nervure (50) en saillie vers une direction opposée à la courbure des cambrures au niveau desquelles est formée la nervure.
- Lame circulaire ondulante selon la revendication 4, dans laquelle l'au moins une nervure (50) est formée sur les cambrures où aucune arête crochue n'est formée.
- Lame circulaire ondulante selon l'une quelconque des revendications précédentes, dans laquelle la périphérie de la lame est intégralement formée en dentelure (11).
- Lame circulaire ondulante selon l'une quelconque des revendications précédentes, dans laquelle le centre de la lame est formé avec un trou polygonal (16).
- Lame circulaire ondulante selon l'une quelconque des revendications précédentes, dans laquelle la lame est faite d'une tôle poinçonnée intégralement dans une poinçonneuse.
- Module de lame circulaire ondulante pour une décliqueteuse, le module de lame comprenant au moins deux lames ondulantes (31, 32), chacune des deux lames comprenant une lame circulaire ondulante selon l'une quelconque des revendications précédentes ;
dans lequel les deux lames ondulantes sont agencées de telle manière que les cambrures (B, B') présentant la même courbure de chacune des lames ondulantes soient opposées l'une à l'autre. - Module de lame circulaire ondulante selon la revendication 9, dans lequel les lames circulaires ondulantes sont agencées de telle manière que les cambrures (B, B') de chacune des lames ondulantes (31, 32) formée avec les arêtes crochues (13) se rejoignent pour entrer en contact l'une avec l'autre.
- Module de lame circulaire ondulante selon la revendication 9 ou la revendication 10, dans lequel le module de lame est intégralement formé par coulée sous pression.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200320104395 | 2003-11-24 | ||
CNU2003201043957U CN2673503Y (zh) | 2003-11-24 | 2003-11-24 | 碎纸机的圆形波浪式刀片及刀片模块 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1533039A2 EP1533039A2 (fr) | 2005-05-25 |
EP1533039A3 EP1533039A3 (fr) | 2005-10-05 |
EP1533039B1 true EP1533039B1 (fr) | 2006-10-11 |
Family
ID=34427793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20040257244 Active EP1533039B1 (fr) | 2003-11-24 | 2004-11-23 | Couteau rond ondulatoire et module de couteau pour destructeur de documents |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1533039B1 (fr) |
CN (1) | CN2673503Y (fr) |
DE (1) | DE602004002747T2 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2751888Y (zh) * | 2004-11-17 | 2006-01-18 | 白淑惠 | 碎纸机刀片 |
GB2435840B (en) * | 2006-03-07 | 2008-02-13 | Emily Lo | Blade for a paper shredder |
US20100181405A1 (en) * | 2009-01-05 | 2010-07-22 | Royal Appliance Mfg. Co.D/B/A Tti Floor Care North America | Blade assembly for shredders of sheet-like material |
CN104307611A (zh) * | 2014-10-13 | 2015-01-28 | 东莞市微然机电科技有限公司 | 一种碎纸机刀片和刀棒 |
DE102016114369A1 (de) * | 2016-08-03 | 2018-02-08 | Sib Strautmann Ingenieurbüro Gmbh | Rotor einer Pressgutzuführeinheit einer Presse |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4236121C2 (de) * | 1992-10-27 | 1996-07-18 | Hermann Schwelling | Vorzerkleinerungs- und Dosiervorrichtung, insbesondere für Großanlagen zur Vernichtung von Akten u. ä. Abfallmaterialien |
US6168104B1 (en) * | 1998-09-25 | 2001-01-02 | Primax Electronics Ltd. | Shredding module used in a paper shredder |
-
2003
- 2003-11-24 CN CNU2003201043957U patent/CN2673503Y/zh not_active Expired - Fee Related
-
2004
- 2004-11-23 EP EP20040257244 patent/EP1533039B1/fr active Active
- 2004-11-23 DE DE602004002747T patent/DE602004002747T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE602004002747T2 (de) | 2007-08-30 |
DE602004002747D1 (de) | 2006-11-23 |
EP1533039A2 (fr) | 2005-05-25 |
EP1533039A3 (fr) | 2005-10-05 |
CN2673503Y (zh) | 2005-01-26 |
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