CN202752078U

CN202752078U - Paper cutting blade for paper shredder

Info

Publication number: CN202752078U
Application number: CN 201220384262
Authority: CN
Inventors: 魏武军
Original assignee: NINGBO WEICHUANG OFFICE EQUIPMENT CO Ltd
Current assignee: NINGBO WEICHUANG OFFICE EQUIPMENT CO Ltd
Priority date: 2012-08-03
Filing date: 2012-08-03
Publication date: 2013-02-27
Anticipated expiration: 2022-08-03

Abstract

The utility model discloses a paper cutting blade for a paper shredder. The paper cutting blade comprises two blade bodies which are mutually attached. Each blade body comprises an outer flat surface perpendicular to the axis of the blade body and a peripheral surface which is arranged at the periphery of the blade body with the axis of the blade body as the symmetry axis, wherein a cutting edge is formed at the junction position between the outer flat surface and the peripheral surface. From the longitudinal section of the blade body, the cutting edge is defined by a straight line which outwards extend along the radial direction of the outer flat surface and an arc line which obliquely and outwards extends along the axial direction of the peripheral surface. Sharp cutting edges are processed at the paper cutting edges of the blade bodies, the cutting edges are defined by the straight lines of the outer flat surfaces and the arc lines of the peripheral surfaces, the cutting edges has the effects on cutting paper, paper shredding capacity of the paper shredder is greatly improved, paper shredding force reduces, a paper shredding process is smooth, paper shredding noise is reduced, machine cost is reduced, machine service life is prolonged, and simultaneously energy consumption is reduced.

Description

A kind of paper cutting blade of paper shredder

Technical field

The utility model relates to a kind of paper cutting blade of shredder.

Background technology

Existing shredder, blade cutter spoke cutting edge substantially all is the right angle, as shown in Figure 1, directly form with dull and stereotyped stamping and blanking, leaning on burr face 1 ' is cutting edge, and blade cutting edge is sharp not, and paper is not to be cut open fully during shredded paper, major part is torn by blade, so shredded paper bits edge is the burr shape, power is large during this kind blade shredded paper, and noise is large, the requirement motor force is large and the transmission system strength of gear teeth is good, and these all can cause the shredder cost to increase.In addition, because for blade tears shredded paper, movement is stressed large, under large impact force action, the as easy as rolling off a log deformed damaged of part such as cutter rod, end plate, cutter ring affect service life of a machine.

In order to improve the shredded paper ability of shredder, reduce the power of shredder, also have to have developed such as Granted publication and number be the disclosed a kind of kneader bar of Chinese patent of CN201271601Y, comprise two blade units bonded to each other, blade units comprises outer circumference surface and outerplanar, be provided with at least one blade on the outer circumference surface, angle between outer circumference surface and the outerplanar is less than 900, so that blade becomes the line contact with contacting by original plane contact of paper to be pulverized, it is lighter to shear paper, and needed power is less.Yet the sharpness of this blade cutting edge is improved few, and comparatively inconvenience of processing, can't directly use the punch ram moulding, if the not only time-consuming difficulty of mode of employing polishing moulding but also large has improved cost, is unfavorable for a large amount of productions.

The utility model content

Technical problem to be solved in the utility model provides the paper cutting blade of paper shredder that a kind of shredded paper is low in energy consumption, noise is little, can greatly improve the shredded paper ability of shredder.

The utility model solves the problems of the technologies described above the technical scheme that adopts: a kind of kneader bar, comprise two blade units bonded to each other, it is characterized in that, described blade units has perpendicular to the outerplanar of the axis of described blade units and is positioned at the outer peripheral face take the axis of described blade units as symmetry axis of described blade units periphery, intersection at described outerplanar and described outer peripheral face is formed with blade, from the longitudinal cross-section of described blade units, described blade limits by the flat line that extends radially outwardly along described outerplanar with along the curved line of the axial oblique extension of described outer peripheral face and forms.

Longitudinal cross-section from described blade units, the bus of described outer peripheral face comprises basically the straightway that extends vertically, and described curved line is from described straightway end oblique extension vertically, so that the blade monolithic can reach the effect of scissors mouth, thus paper is sheared and opened, the effect of shredded paper is better.

Preferably, the thickness of described blade units is 1mm ~ 4mm, and the axial height of described blade is 0.2mm ~ 1.5mm, and the radial height of described blade is 0.1mm ~ 1mm, so that blade has preferably shredded paper effect.

The radially inner side place that is positioned at described blade on the described outerplanar offers the detent of annular, when processing blades, can in the detent place of blade pressing and bending, guarantee that the position of bending is consistent in the bending step.

The periphery of described blade units also has at least one sword that blocks that stretches out and form from described outer peripheral face, thereby will be blocked by the shredded paper bar that blade is sheared.

Compared with prior art, the utility model has the advantage of: process sharp blade by the cut paper edge at blade units, this blade is limited by the curved line of outerplanar flat line and outer peripheral face, so that blade plays the effect of shearing paper, will greatly promote the shredded paper ability of shredder, shredded paper power is diminished, the shredded paper process becomes smooth-going, and the shredded paper noise reduces, and reduces machine cost, prolong machine service life, reduce simultaneously energy consumption.

Description of drawings

Fig. 1 is the blade cutting edge schematic diagram of prior art;

Fig. 2 is blade schematic diagram of the present utility model;

Fig. 3 is the partial sectional view of blade of the present utility model;

Fig. 4 is the blade schematic diagram of the step 1 of moulding process of the present utility model;

Fig. 5-1 is the blade schematic diagram of the step 2 of moulding process of the present utility model;

Fig. 5-2 is the cutaway view of Fig. 5-1;

Fig. 6-1 is the blade schematic diagram of the step 3 of moulding process of the present utility model;

Fig. 6-2 is the cutaway view of Fig. 6-1;

Fig. 7-1 is the blade cutaway view in the step 4 of moulding process of the present utility model;

Fig. 7-2 is the cutaway view of blade after the moulding of moulding process of the present utility model.

The specific embodiment

Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.

Referring to Fig. 2, a kind of paper cutting blade of paper shredder, comprise two blade units bonded to each other 1, each blade units 1 has perpendicular to the outerplanar 11 of self axis and is positioned at the outer peripheral face 12 take self axis as symmetry axis of periphery, and the intersection of outerplanar 11 and outer peripheral face 12 is formed with blade 13.

Referring to Fig. 3, it is vertical partial sectional view of two blade units 1, outer peripheral face 12 is the shape of approximate circle cylinder, the bus of outer peripheral face 12 comprises vertically the straightway 121 that vertically extends and from the straightway 121 ends curved line 122 of oblique extension also vertically, curved line 122 defines blade 13 with the flat line that extends radially outwardly 111 of outerplanar 11.Offer the detent 112 of annular on the outerplanar 11 with respect to the radially inner side place of blade 13, so that the processing of blade units 1.The periphery of blade units 1 have at least one on outer peripheral face 12, stretch out form block sword 14, thereby will be blocked by the shredded paper bar that blade 13 is sheared.

When outerplanar herein refers to that shredder is installed, two blade monolithics 1 mutually away from one side, lower with.

Wherein, preferred, the thickness a of blade units 1 is 1mm ~ 4mm, and the axial height b of blade 13 is 0.2mm ~ 1.5mm, and the radial height c of blade 13 is 0.1mm ~ 1mm.The blade 13 of this structure is sheared paper thus and is opened so that blade monolithic 1 can reach the effect of scissors mouth, and the effect of shredded paper is better.

The moulding process of above-mentioned this blade units is, step 1, referring to Fig. 4, stamping and blanking, dull and stereotyped stamping and blanking is formed blade base substrate 2, then blade base substrate 2 perpendicular to the outerplanar 21 of self axis on stamp out the detent 112 of annular near outer edge;

Step 2, referring to Fig. 5-1 and Fig. 5-2, pressing and bending, with blade base substrate 2 in detent 211 place's pressing and bending, so that blade base substrate 2 has a certain degree to outerplanar 21 direction bendings in the part that is positioned at detent 211 outsides, it is on the different planes from the part that is positioned at detent 211 inboards;

Step 3 referring to Fig. 6-1 and Fig. 6-2, cuts, and the outside of blade base substrate 2 is carried out axial vertical stamping-out and cut, and the outer peripheral face 22 of the blade base substrate 2 that obtain this moment is the face of cylinder;

Step 4, referring to Fig. 7-1, the back side at the detent 211 of blade base substrate 2 applies axial power to whole blade base substrate 2,, the dogleg section after cutting in the step 3 makes blade base substrate 2 alignings so that being out of shape, bus after outer peripheral face 22 distortion comprises the straightway 221 that axially vertically extends and from the straightway 221 ends curved line 222 of oblique extension also vertically, curved line 222 defines blade 23 with the flat line that extends radially outwardly 212 of outerplanar 21, thus blade units moulding is referring to Fig. 7-2.

The above only is preferred embodiment of the present utility model; should be pointed out that for the ordinary skill in the art, do not breaking away under the principle prerequisite of the present utility model; can also make various deformation and improvement, this also should be considered as protection domain of the present utility model.

Claims

1. paper cutting blade of paper shredder, comprise two blade units bonded to each other (1), it is characterized in that, described blade units (1) has perpendicular to the outerplanar (11) of the axis of described blade units (1) and is positioned at the outer peripheral face (12) take the axis of described blade units (1) as symmetry axis of described blade units (1) periphery, intersection at described outerplanar (11) and described outer peripheral face (12) is formed with blade (13), from the longitudinal cross-section of described blade units (1), described blade (13) limits by the flat line (111) that extends radially outwardly along described outerplanar (11) with along the curved line (122) of the axial oblique extension of described outer peripheral face (12) and forms.

2. paper cutting blade of paper shredder as claimed in claim 1, it is characterized in that, longitudinal cross-section from described blade units (1), the bus of described outer peripheral face (12) comprises basically the straightway (121) that extends vertically, and described curved line (122) is from described straightway (121) end oblique extension vertically.

3. paper cutting blade of paper shredder as claimed in claim 2, it is characterized in that, the thickness of described blade units (1) is 1mm ~ 4mm, and the axial height of described blade (13) is 0.2mm ~ 1.5mm, and the radial height of described blade (13) is 0.1mm ~ 1mm.

4. such as each described paper cutting blade of paper shredder among the claim 1-3, it is characterized in that the radially inner side place that is positioned at described blade (13) on the described outerplanar (11) offers the detent (112) of annular.

5. paper cutting blade of paper shredder as claimed in claim 1 is characterized in that, the periphery of described blade units (1) also have at least one from described outer peripheral face (12) stretch out form block sword (14).