EP1522345A1 - Ein elliptisches acetabuliförmiges Messer für Schredder - Google Patents

Ein elliptisches acetabuliförmiges Messer für Schredder Download PDF

Info

Publication number
EP1522345A1
EP1522345A1 EP03023159A EP03023159A EP1522345A1 EP 1522345 A1 EP1522345 A1 EP 1522345A1 EP 03023159 A EP03023159 A EP 03023159A EP 03023159 A EP03023159 A EP 03023159A EP 1522345 A1 EP1522345 A1 EP 1522345A1
Authority
EP
European Patent Office
Prior art keywords
blade
elliptical
acetabuliform
cutting
paper
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.)
Withdrawn
Application number
EP03023159A
Other languages
English (en)
French (fr)
Inventor
Simon Huang
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.)
Michilin Prosperity Co Ltd
Original Assignee
Michilin Prosperity Co Ltd
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 Michilin Prosperity Co Ltd filed Critical Michilin Prosperity Co Ltd
Priority to EP03023159A priority Critical patent/EP1522345A1/de
Publication of EP1522345A1 publication Critical patent/EP1522345A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • B02C18/142—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with two or more inter-engaging rotatable cutter assemblies

Definitions

  • the present invention relates to an improved cutting blade for a shredder, especially to an elliptical acetabuliform blade that is integrally formed by punching a sheet metal in a mold machine.
  • 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, and each cutter is disposed helically along the rotary cutter shaft for first cutting paper along a longitudinal direction into strips and then cutting paper along a horizontal 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 mold.
  • 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 120 degrees apart around the periphery. As shown, when two blades are arranged on the rotary shafts B 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 opposite rotary shafts B' space the two blades apart by spacer (not shown) in a face-to-face manner to form a set of blade A'.
  • the opposing rotation of the periphery of the blades that is, flanks A4 and flanks A4 will cut the paper like scissors.
  • the opposing rotation of cutting edges A2 and the opposite flanks A4 will then cut the paper along a horizontal direction into 4 mm ⁇ 40 mm paper chips.
  • the thickness of the blade is the same as the width of the 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 thickness of the conventional blades is same as the width of the paper-to-be-cut, and because the location of the width define the horizontal cutting points, the narrower width of cross-section is, 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, that is, to reduce the power consumed by the motor.
  • the width of the paper-to-be-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.
  • the main objective of the present invention is to provide an elliptical acetebuliform blade for shredders, that is integrally punched from a sheet metal in a mold into an elliptical acetabuliform blade to effectively reduce the material cost and the weigh of the blade to thereby reduce the motor loading and power consumption.
  • Another objective of the present invention is to provide an elliptical acetabuliform blade for shredders, that uses the change in the curvature of the elliptical acetabuliform blade to cut paper into paper chips each having a wider center and 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.
  • a sheet metal is punched by a mold to integrally form an elliptical acetabuliform blade, where the periphery of elliptical blade is integrally formed into serration.
  • the serrated periphery extending horizontally inwards to integrally form a planar disk for cutting paper along a longitudinal direction serves as a flank.
  • the two ends along the major axis of the elliptical of the flank are integrally formed into a hooked edge for cutting the paper along a longitudinal direction to form paper chips having double-tapering ends.
  • An inner edge of the flank then integrally extends inwards and downwards to form an arc base and then a circular base.
  • a polygonal hole is formed in a center of the circular base, through which a rotary shaft may pass.
  • Figs. 3 to 5 where Fig. 3 illustrates the planar view of the present invention, and Figs. 4 and 5 are cross-sectional views taken from lines 4-4 and line 5-5 in Fig. 3, 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 thickness of 0.2 mm as a raw material, the selected sheet metal is punched into an elliptical acetabuliform blade by a mold.
  • the periphery 11 shown in the enlarged view of Fig. 3) of the elliptical blade is integrally formed into serration 110.
  • the periphery 11 of serration serves to pull the paper-to-be-cut downwards.
  • the acetabuliform periphery 11 extending horizontally inwards to integrally form a planar disk for cutting paper along a longitudinal direction serves as a flank 12.
  • the two ends along the major axis of the-elliptical flank 12 are each integrally formed into a hooked edge 13 for cutting the paper along a longitudinal direction to form paper chips having double-tapering ends.
  • An inner edge 120 of the flank 12 integrally extends inwards and downwards to form an arc base 14 and then a circular base 15.
  • a polygonal hole 16 is formed in a center of the circular base 15, through which a rotary shaft may pass.
  • the standardized elliptical acetabuliform blades punched from a sheet metal by a mold are arranged sequentially on two rotary shafts to be assembled into the rotary cutting tool that is most important for a shredder.
  • the elliptical acetabuliform blades on one of the rotary shafts are arranged by alternating in forward and reversed orientations.
  • the elliptical acetabuliform blades on the other rotary shaft are then arranged by alternating in reversed and forwards orientations.
  • the first blade 21 and the second blade 22 on a lower first rotary shaft 2 are arranged by alternating in the forward and reversed orientations. Because the blades extend from an inner periphery of flank inwards and downwards to form an arc base and then a circular base, the circular base of the first blade 21 and second blade 22 join to contact each other while the hooked edges of the first blade 21 and the second blade 22 are separated from each other to assume an open space 23.
  • the first blade 31 and second blade 32 on an upper second rotary shaft 3 are arranged by alternating in the forward and inversed orientations.
  • the blades extend from the inner periphery of the flanks inwards and downwards to form an arc base and then a circular base, the circular base of the first blade 31 and second blade 32 are separated from each other, while the hooked edges of the first blade 31 and the second blade 322 are joined to contact each other.
  • the hooked edges 33 of the first blade 31 and the second blade 32 on the upper second rotary shaft 3 after contacting each other adapt to insert into the open space 23 of the first blade 21 and second blade 22 on the lower first rotary shaft 2.
  • the standardized elliptical acetabuliform blades enable the flanks of the corresponding blade set to maintain a certain contact gap at all time by means of the changes between the major axis and minor axis of the elliptical blades and the 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 rotate in opposing directions (shown in Fig. 7).
  • Figs. 9 and 10 illustrate the schematic views of the elliptical acetabuliform blade of the present invention fragmenting paper after cutting, and the paper after being cut by the elliptical acetabuliform blade of the present invention.
  • the paper is fragmented into paper chips 4 each having a wider center 42 and tapering towards the ends 41. Because of the two ends 41 of the paper chip 4 are the horizontal cutting positions, the narrower width of cross-section is, 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 conventional blade is punched from a sheet metal having thickness of about 2mm
  • the elliptical acetabuliform blade of the present invention may be punched from a sheet metal having a minimum thickness of 0.2mm, 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. These characteristics help to reduce the manufacturing cost and enhance the market competitiveness.
  • a sheet metal may be punched into elliptical acetabuliform blades, where the periphery of each elliptical blade is integrally made into serration.
  • the serrated periphery extending horizontally inwards to integrally form a planar disk for cutting paper along a longitudinal direction serves as a flank.
  • the two ends along the major axis of the elliptical flank are each integrally formed into a hooked edge for cutting the paper along a longitudinal direction to form paper chips having double-tapering ends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP03023159A 2003-10-10 2003-10-10 Ein elliptisches acetabuliförmiges Messer für Schredder Withdrawn EP1522345A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03023159A EP1522345A1 (de) 2003-10-10 2003-10-10 Ein elliptisches acetabuliförmiges Messer für Schredder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03023159A EP1522345A1 (de) 2003-10-10 2003-10-10 Ein elliptisches acetabuliförmiges Messer für Schredder

Publications (1)

Publication Number Publication Date
EP1522345A1 true EP1522345A1 (de) 2005-04-13

Family

ID=34306901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03023159A Withdrawn EP1522345A1 (de) 2003-10-10 2003-10-10 Ein elliptisches acetabuliförmiges Messer für Schredder

Country Status (1)

Country Link
EP (1) EP1522345A1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6168104B1 (en) * 1998-09-25 2001-01-02 Primax Electronics Ltd. Shredding module used in a paper shredder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6168104B1 (en) * 1998-09-25 2001-01-02 Primax Electronics Ltd. Shredding module used in a paper shredder

Similar Documents

Publication Publication Date Title
US6981667B2 (en) Elliptical acetabuliform blade for shredder
US20050109866A1 (en) Shredder blade made by punching and bending
US7044410B2 (en) Round undulating blade and blade module for shredder
US7533839B2 (en) Cutting blade and rotary cutting assembly for shredders
US7644881B2 (en) Round undulating blade, blade module, and rotary assembly for shredder
JP5089242B2 (ja) 剪断破砕機の固定刃
US7354012B2 (en) Round undulating blade and blade module for shredder
EP1533039B1 (de) Rundes wellenförmiges Messer und Messerbaugruppe für Schredder
EP1522345A1 (de) Ein elliptisches acetabuliförmiges Messer für Schredder
CN105772183A (zh) 一种碎卡机
JP3147671B2 (ja) ロータリーダイカッター
JP4826227B2 (ja) ロータリーダイ
CN210548359U (zh) 一种铣削刀具
JP4863624B2 (ja) 二軸せん断式破砕装置およびその破砕刃の製造方法
JP2010120149A (ja) カッターブレード及びカッターヘッド
JP3101199U (ja) シュレッダーの楕円形ディスク式切断ブレード
JP5814580B2 (ja) チップドレス用切削カッター
JP2011212533A (ja) 固定刃ユニット及び破砕装置
JPH06335814A (ja) エンドミル
US20070095960A1 (en) Paper shredder cutting tool
JP2000288418A (ja) 文書細断機用の回転カッタ及びその製造方法そして文書細断機
CN213055031U (zh) 一种剪切割轮胎的刀具
JP2009241035A (ja) 破砕装置、固定刃、固定刃部、及び、回転刃
JP2001334411A (ja) スリッター装置
JP4065900B1 (ja) おが粉製造用切削刃及びその切削刃集合体

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20051010

AKX Designation fees paid

Designated state(s): DE FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100504